Abu Hurairah (May Allah be pleased with him) reported:
We were sitting in the company of the Messenger of Allah ﷺ, and Abu Bakr and 'Umar (May Allah be pleased with them) were also present. All of a sudden the Messenger of Allah ﷺ got up and left us. When he was late to return to us we began to worry lest he should meet with trouble in our absence. I was the first to be alarmed and set out in search of him until I came to a garden belonging to Banu-Najjar (a section of the Ansar). I went round it looking for an entrance, but failed to find one. However, I saw a stream of water flowing into the garden from a well outside. I drew myself together like a fox and slinked into the place and reached the Messenger of Allah ﷺ. He said, "Is it Abu Hurairah?" I replied in the affirmative. He asked, "What is the matter with you?" I replied, "You were sitting with us and then you left us and delayed for a time. Fearing you had met with some adversities we got alarmed. I was the first to be alarmed. So when I came to this garden, I squeezed myself like a fox and these people are coming behind me." He (the Prophet ﷺ) gave me his sandals and said, "O Abu Hurairah! Take these sandals of mine, and whoever you meet outside this garden testifying that La ilaha illallah (There is no true god except Allah), being assured of it in his heart, give him the glad tidings that he will enter Jannah." (Abu Hurairah then narrated the Hadith in full).

[Muslim].

وعن أبي هريرة رضي الله عنه قال: كنا قعوداً حول رسول الله ﷺ ، ومعنا أبو بكر وعمر رضي الله عنهما في نفر، فقام رسول الله ﷺ من بين أظهرنا فأبطأ علينا، وخشينا أن يقتطع دوننا وفزعنا فقمنا، فكنت أول من فزع، فخرجت أبتغي رسول الله ﷺ ، حتى أتيت حائطاً للأنصار لبني النجار، فدرت به هل أجد له باب، فلم أجد، فإذا ربيع يدخل في جوف حائط من بئر خارجه -والربيع: الجدول الصغير -فاحتفزت، فدخلت على رسول الله ﷺ فقال: “أبو هريرة؟” فقلت: نعم يا رسول الله ، قال: “ما شأنك” قلت: كنت بين أظهرنا فقمت فأبطأت علينا، فخشينا أن تقتطع دوننا، ففزعنا، فكنت أول من فزع، فأتيت هذا الحائط فاحتفرت كما يحتفر الثعلب، وهؤلاء الناس ورائي. فقال: "يا أبا هريرة" وأعطاني نعليه فقال: "اذهب بنعلي هاتين، فمن لقيت من وراء هذا الحائط يشهد أن لا إله إلا الله مستيقنا بها قلبه، فبشره بالجنة" وذكر الحديث بطوله، ((رواه مسلم)).