The Messenger of Allah ﷺ said, "When one of you rises at night and the Quran becomes difficult on his tongue so that he does not know what he is saying, let him lie down."
عن رسول الله ﷺ قال: إذا قام أحدكم من الليل، فاستعجم القرآن على لسانه فلم يدر ما يقول فليضطجع.
Muslim reported it in the Book of Travelers (787), from Muhammad bin Rafi, who said, "Abdul-Razzaq narrated to us, Mamar narrated to us, from Hammam bin Munabbih, from Abu Hurairah," and he related the hadith.