Lady Aisha Siddiqa (may Allah be pleased with her) narrates: When the Prophet Muhammad (peace and blessings be upon him) would wake up at night, he would recite this: "There is no deity except Allah. O Allah, You are pure; I seek forgiveness for my sin from You. I ask You for Your mercy. O Allah! Increase me in knowledge and do not let my heart deviate after You have guided me, and grant me mercy from Your bounty. Surely, You are the Great Bestower."
Hadith Referenceصحیح ابن حبان / كتاب الزينة والتطييب / 5531
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيضعيف - «الكلم الطيب» (45).فضيلة الشيخ العلّامة شُعيب الأرناؤوطNull