Sayyiduna Abu Hurayrah (may Allah be pleased with him), while narrating his stories, would mention the Messenger of Allah (peace and blessings be upon him): "Your brother does not speak obscenity," meaning Abdullah bin Rawahah. The verses:
1 Among us is the Messenger of Allah, who recites His Book when the dawn of goodness breaks.
2 He guided us after blindness, and our hearts are certain of it: what he has said is bound to happen.
3 He spends the night with his sides apart from the bed, at the time when the sides of the disbelievers are heavy upon their beds, that is, clinging to them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الشهادات / 21112