It is narrated from Sayyidah Aishah (may Allah be pleased with her) that when the Messenger of Allah (peace and blessings be upon him) woke up at night, he would say: 'La ilaha illa anta subhanak, Allahumma inni astaghfiruka li dhanbi, wa as'aluka bi rahmatik, Allahumma zidni 'ilma, wa la tuzigh qalbi ba'da idh hadaytani, wa hab li min ladunka rahmah, innaka antal-Wahhab' (There is no god but You, glory be to You. O Allah, I seek Your forgiveness for my sins and 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 Yourself; indeed, You alone are the Bestower) [Surah Al Imran: 8] . This hadith is sahih al-isnad (authentic in its chain), but the two Shaykhs did not record it.