It is narrated from Sayyidah Aisha (may Allah be pleased with her) that the Messenger of Allah (peace and blessings be upon him) spent one night performing Tahajjud. When morning came, he said: "May Allah have mercy on so-and-so, how many verses he reminded me of which I had been made to forget."
Hadith Referenceمسند اسحاق بن راهويه / كتاب التهجد و التطوع / 237
Hadith Takhrij«سنن ابوداود ، كتاب الصلاة ، باب رفع الصوت بالقراء فى صلاة الليل ، رقم : 3970 ، 1331 . قال الالباني : صحيح»