Sahih Ibn Khuzaymah 740 — 242 Chapter: Saying "La ilaha illa Allah"

Abu Zubair says that I heard Abdullah bin Zubair (may Allah be pleased with him) delivering a sermon on this pulpit, and he was saying that when the Messenger of Allah (peace and blessings be upon him) would finish the prayer with salam, he would recite these words after the prayer, « لاَ إِلَهَ إِلاَّ اللَّهُ لاَ نَعْبُدُ إِلَّا إیَّاہُ أَهْلُ النِّعْمَةِ وَالْفَضْلِ وَالثَّنَاءِ الْحَسَنِ، لاَ إِلَهَ إِلاَّ اللَّهُ مُخْلِصِينَ لَهُ الدِّينَ وَلَوْ كَرِهَ الْكَافِرُونَ » "There is no deity worthy of worship except Allah, we worship Him alone, Who is the Possessor of blessings, Owner of all grace and bounty, and the One most deserving of praise and gratitude. There is no one worthy of worship except Allah, we worship Him sincerely, even if the disbelievers dislike it."