Making Judgment of people keeping in view their evident actions and leaving their hidden Actions to Allah (swt)

'Abdullah bin 'Umar (May Allah be pleased with them) reported:
Messenger of Allah ﷺ said, "I have been commanded (by Allah) to fight people until they testify that there is no true god except Allah, and that Muhammad is the Messenger of Allah, and perform Salat and pay Zakat. If they do so, they will have protection of their blood and property from me except when justified by Islam, and then account is left to Allah".

[Al-Bukhari and Muslim].

وعن ابن عمر رضي الله عنهما، أن رسول الله ﷺ قال: "أمرت أن أقاتل الناس حتى يشهدوا أن لا إله إلا الله ، وأن محمداً رسول الله ، ويقيموا الصلاة، ويؤتوا الزكاة ، فإذا فعلوا ذلك عصموا مني دماءهم وأموالهم إلا بحق الإسلام، وحسابهم على الله تعالى" ((متفق عليه)) .

Abu Abdullah bin Tariq bin Ashyam (May Allah be pleased with him) reported:
Messenger of Allah ﷺ said, "He who professes La ilaha illallah (There is no true god except Allah), and denies of everything which the people worship besides Allah, his property and blood become inviolable, and it is for Allah to call him to account".

[Muslim].

وعن أبي عبد الله طارق بن أشيم ، رضي الله عنه ، قال: سمعت رسول الله ﷺ يقول: " من قال لا إله إلا الله ، وكفر بما يعبد من دون الله، حرم ماله ودمه، وحسابه على الله تعالى" ((رواه مسلم)).

Al-Miqdad bin Al-Aswad (May Allah be pleased with him) reported:
I said, "Tell me, O Messenger of Allah, if I meet an infidel, and we fight together, and he cuts off my hands with his sword, then hides from me behind a tree and (then) says he has submitted himself to Allah. Shall I kill him after he has said it?" He ﷺ replied, "Do not kill him." I submitted, "But O Messenger of Allah, he cut off one of my hands and only then he said it." Messenger of Allah ﷺ then replied, "Do not kill him, for if you do so, he will be in the position in which you were before you killed him (i.e., he will be considered a Muslim and thus his life will be inviolable), and you will be in the position in which he was before he made his testimony (i.e., your life will not be inviolable, for his heirs can ask for Qisas)".

[Al-Bukhari and Muslim].

وعن أبي المقداد بن الأسود، رضي الله عنه ، قال: قلت لرسول الله ﷺ : أرأيت إن لقيت رجلاً من الكفار، فاقتتلنا، فضرب إحدى يدى بالسيف، فقطعها، ثم لاذ منى بشجرة، فقال أسلمت لله، أأقتله يارسول الله بعد أن قالها؟ فقال: "لا تقتله، فإن قتلته، فإنه بمنزلتك قبل أن تقتله، وإنك بمنزلته قبل أن يقول كلمته التى قال" ((متفق عليه)) . (1)

Usamah bin Zaid (May Allah be pleased with them) reported:
Messenger of Allah ﷺ sent us to Huraqat, a tribe of Juhainah. We attacked that tribe early in the morning and defeated them, (then) a man from the Ansar and I caught hold of a man (of the defeated tribe). When we overcame him, he said: 'La ilaha illallah (There is no true god except Allah).' At that moment, the Ansari spared him, but I attacked him with my spear and killed him. By the time we went back to Al-Madinah, news had already reached Messenger of Allah ﷺ. He said to me, "O Usamah, did you kill him after he professed La ilaha illallah (There is no true god except Allah)?" I said, "O Messenger of Allah! He professed it only to save his life." Messenger of Allah ﷺ repeated, "Did you kill him after he had professed La ilaha illallah?" He went on repeating this to me until I wished I had not embraced Islam before that day (so that I would have not committed this sin).

[Al-Bukhari and Muslim].

Another narration is: Messenger of Allah ﷺ said, "Did you kill him in spite of his professing La ilaha illallah?" I said, "O Messenger of Allah! He said out of fear of our arms." He ﷺ said, "Why did you not cut his heart open to find out whether he had done so sincerely or not?" He continued repeating it until I wished that I had embraced Islam only that day.

وعن أسامة بن زيد، رضي الله عنهما، قال: بعثنا رسول الله ﷺ، إلى الحرقة من جهينة ، فصبحنا القوم على مياههم، ولحقت أنا ورجل من الأنصار رجلاً منهم، فلما غشيناه قال: لا إله إلا الله ، فكف عنه الأنصاري، وطعنته برمحي حتى قتلته، فلما قدمنا المدينة بلغ ذلك النبي، ﷺ، فقال لى: " يا أسامة أقتلته بعد ما قال لا إله إلا الله؟! قلت يا رسول الله إنما كان متعوذا فقال ” أقتلته بعد ما قال لا إله إلا الله؟!" فما زال يكررها على حتى تمنيت أني لم أكن أسلمت قبل ذلك اليوم. ((متفق عليه)) . وفي رواية: فقال رسول الله ﷺ "أقال : لا إله إلا الله وقتلته؟! قلت: يا رسول الله، إنما قالها خوفاً من السلاح، قال: "أفلا شققت عن قلبه حتى تعلم أقالها أم لا؟!" فما زال يكررها حتى تمنيت أني أسلمت يومئذ.

Jundub bin 'Abdullah (May Allah be pleased with him) reported:
Messenger of Allah ﷺ dispatched a contingent of the Muslims to a tribe of the polytheists. The two sides met (in combat) at one place. A man among the polytheists was so dashing that, whenever he intended to kill a man from Muslims, he killed him. Amongst the Muslims, too, was a man looking forward to (an opportunity of) his (polytheist's) unmindfulness. He (the narrator) said: We talked that he was Usamah bin Zaid (May Allah be pleased with him). When he raised his sword, he (the soldier of the polytheists) uttered: "La ilaha illallah (There is no true god except Allah)." But he (Usamah bin Zaid) killed him. When the good news of victory reached Messenger of Allah ﷺ he asked him (about the events of the battle), and he informed him about the man (Usamah) and what he had done. He (Messenger of Allah ﷺ) sent for him and asked him why he had killed him. He (Usamah) said, "O Messenger of Allah, he struck the Muslims and killed such and such of them." And he named some of them. (He continued): "I attacked him and when he saw the sword he said: 'La ilaha illallah."' Messenger of Allah ﷺ said, "Did you kill him?" He (Usamah) replied in the affirmative. The Messenger of Allah then remarked, "What would you do with regard to (the utterance): La ilaha illallah, when it comes (before you) on the Day of Resurrection?" He (Usamah) said, "O Messenger of Allah! Beg forgiveness for me". He (the Prophet ﷺ) said, "What would you do with regard to (the utterance): La ilaha illallah, when it comes (before you) on the Day of Resurrection?" He (Messenger of Allah ﷺ) added nothing to it but kept repeating, "What would you do with regard to (the utterance): La ilaha illallah, when it comes (before you) on the Day of Resurrection?".

[Muslim].

وعن جندب بن عبد الله، رضي الله عنه ، أن رسول الله ﷺ، بعث بعثاً من المسلمين إلى قوم من المشركين، وأنهم التقوا فكان رجلاً من المشركين إذا شاء أن يقصد إلى رجل من المسلمين قصد له فقتله، وأن رجلاً من المسلمين قصد غفلته، وكنا نتحدث أنه أسامة بن زيد، فلما رفع عليه السيف ، قال: لا إله إلا الله، فقتله، فجاء البشير إلى رسول الله ، ﷺ فسأله ، وأخبره، حتى أخبره خبر الرجل كيف صنع ، فدعاه فسأله، فقال: "لم قتلته؟ فقال: يا رسول الله أوجع في المسلمين، وقتل فلانا وفلانا -وسمى له نفراً- وإني حملت عليه، فلما رأى السيف قال: لا إله إلا الله. قال رسول الله ﷺ: "اقتلته؟" قال نعم : قال: "فكيف تصنع بلا إله إلا الله، إذا جاءت يوم القيامة؟ قال: يا رسول الله استغفر لي. قال: "وكيف تصنع بلا إله إلا الله إذا جاءت يوم القيامة؟ " فجعل لا يزيد على أن يقول: " كيف تصنع بلا إله إلا الله إذا جاءت يوم القيامة" ((رواه مسلم)).