Anas b. Malik reported that Messenger of Allah ﷺ said to Ubayy b. Ka'b: I have been commanded to recite to you the Sura (al- Bayyinah) which opens with these words (Lam Yakunil-ladhiyna Kafaruu) He said: Has he mentioned to you my name? He said: Yes;
thereupon he shed tears of joy. This hadith has been narrated on the authority of Anas through another chain of transmitters.

حَدَّثَنَا مُحَمَّدُ بْنُ الْمُثَنَّى، وَابْنُ، بَشَّارٍ قَالاَ حَدَّثَنَا مُحَمَّدُ بْنُ جَعْفَرٍ، حَدَّثَنَا شُعْبَةُ، قَالَ سَمِعْتُ قَتَادَةَ، يُحَدِّثُ عَنْ أَنَسِ بْنِ مَالِكٍ، قَالَ قَالَ رَسُولُ اللَّهِ ﷺ لأُبَىِّ بْنِ كَعْبٍ " إِنَّ اللَّهَ أَمَرَنِي أَنْ أَقْرَأَ عَلَيْكَ { لَمْ يَكُنِ الَّذِينَ كَفَرُوا} " . قَالَ وَسَمَّانِي قَالَ " نَعَمْ " . قَالَ فَبَكَى .