The Prophet ﷺ inviting his followers to Tauhid of Allah

Narrated Ibn Abbas:

When the Prophet sent Muadh to Yemen, he said to him, "You are going to a nation from the people of the Scripture, so let the first thing to which you will invite them, be the Tauhid of Allah. If they learn that, tell them that Allah has enjoined on them, five prayers to be offered in one day and one night. And if they pray, tell them that Allah has enjoined on them Zakat of their properties and it is to be taken from the rich among them and given to the poor. And if they agree to that, then take from them Zakat but avoid the best property of the people."

وَحَدَّثَنِي عَبْدُ اللَّهِ بْنُ أَبِي الأَسْوَدِ، حَدَّثَنَا الْفَضْلُ بْنُ الْعَلاَءِ، حَدَّثَنَا إِسْمَاعِيلُ بْنُ أُمَيَّةَ، عَنْ يَحْيَى بْنِ عَبْدِ اللَّهِ بْنِ مُحَمَّدِ بْنِ صَيْفِيٍّ، أَنَّهُ سَمِعَ أَبَا مَعْبَدٍ، مَوْلَى ابْنِ عَبَّاسٍ يَقُولُ سَمِعْتُ ابْنَ عَبَّاسٍ، يَقُولُ لَمَّا بَعَثَ النَّبِيُّ ﷺ مُعَاذًا نَحْوَ الْيَمَنِ قَالَ لَهُ " إِنَّكَ تَقْدَمُ عَلَى قَوْمٍ مِنْ أَهْلِ الْكِتَابِ فَلْيَكُنْ أَوَّلَ مَا تَدْعُوهُمْ إِلَى أَنْ يُوَحِّدُوا اللَّهَ تَعَالَى فَإِذَا عَرَفُوا ذَلِكَ فَأَخْبِرْهُمْ أَنَّ اللَّهَ فَرَضَ عَلَيْهِمْ خَمْسَ صَلَوَاتٍ فِي يَوْمِهِمْ وَلَيْلَتِهِمْ، فَإِذَا صَلُّوا فَأَخْبِرْهُمْ أَنَّ اللَّهَ افْتَرَضَ عَلَيْهِمْ زَكَاةً فِي أَمْوَالِهِمْ تُؤْخَذُ مِنْ غَنِيِّهِمْ فَتُرَدُّ عَلَى فَقِيرِهِمْ، فَإِذَا أَقَرُّوا بِذَلِكَ فَخُذْ مِنْهُمْ وَتَوَقَّ كَرَائِمَ أَمْوَالِ النَّاسِ ".

Narrated Mu'adh bin Jabal:

The Prophet ﷺ said, "O Mu'adh! Do you know what Allah's Right upon His slaves is?" I said, "Allah and His Apostle know best." The Prophet ﷺ said, "To worship Him (Allah) Alone and to join none in worship with Him (Allah). Do you know what their right upon Him is?" I replied, "Allah and His Apostle know best." The Prophet ﷺ said, "Not to punish them (if they do so)."

حَدَّثَنَا مُحَمَّدُ بْنُ بَشَّارٍ، حَدَّثَنَا غُنْدَرٌ، حَدَّثَنَا شُعْبَةُ، عَنْ أَبِي حَصِينٍ، وَالأَشْعَثِ بْنِ سُلَيْمٍ، سَمِعَا الأَسْوَدَ بْنَ هِلاَلٍ، عَنْ مُعَاذِ بْنِ جَبَلٍ، قَالَ قَالَ النَّبِيُّ ﷺ " يَا مُعَاذُ أَتَدْرِي مَا حَقُّ اللَّهِ عَلَى الْعِبَادِ ". قَالَ اللَّهُ وَرَسُولُهُ أَعْلَمُ. قَالَ " أَنْ يَعْبُدُوهُ وَلاَ يُشْرِكُوا بِهِ شَيْئًا، أَتَدْرِي مَا حَقُّهُمْ عَلَيْهِ ". قَالَ اللَّهُ وَرَسُولُهُ أَعْلَمُ. قَالَ " أَنْ لاَ يُعَذِّبَهُمْ ".

Narrated Abu Said Al-Khudri:

A man heard another man reciting (in the prayers): 'Say (O Muhammad): "He is Allah, the One." (112.1) And he recited it repeatedly. When it was morning, he went to the Prophet and informed him about that as if he considered that the recitation of that Sura by itself was not enough. Allah's Apostle ﷺ said, "By Him in Whose Hand my life is, it is equal to one-third of the Quran."

حَدَّثَنَا إِسْمَاعِيلُ، حَدَّثَنِي مَالِكٌ، عَنْ عَبْدِ الرَّحْمَنِ بْنِ عَبْدِ اللَّهِ بْنِ عَبْدِ الرَّحْمَنِ بْنِ أَبِي صَعْصَعَةَ، عَنْ أَبِيهِ، عَنْ أَبِي سَعِيدٍ الْخُدْرِيِّ، أَنَّ رَجُلاً، سَمِعَ رَجُلاً، يَقْرَأُ {قُلْ هُوَ اللَّهُ أَحَدٌ} يُرَدِّدُهَا، فَلَمَّا أَصْبَحَ جَاءَ إِلَى النَّبِيِّ ﷺ فَذَكَرَ لَهُ ذَلِكَ، وَكَأَنَّ الرَّجُلَ يَتَقَالُّهَا فَقَالَ رَسُولُ اللَّهِ ﷺ " وَالَّذِي نَفْسِي بِيَدِهِ إِنَّهَا لَتَعْدِلُ ثُلُثَ الْقُرْآنِ ". زَادَ إِسْمَاعِيلُ بْنُ جَعْفَرٍ عَنْ مَالِكٍ، عَنْ عَبْدِ الرَّحْمَنِ، عَنْ أَبِيهِ، عَنْ أَبِي سَعِيدٍ، أَخْبَرَنِي أَخِي، قَتَادَةُ بْنُ النُّعْمَانِ عَنِ النَّبِيِّ ﷺ.