Riyad as-Salihin 1186
Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "When anyone of you stands up for Salat at night and finds it difficult to recite the Qur'an accurately and he is unaware of what he is reciting, he should go back to sleep." [Muslim] .
وعن أبي هريرة رضي الله عنه قال‏:‏ قال رسول الله صلى الله عليه وسلم ‏:‏ ‏
"‏إذا قام أحدكم، من الليل فاستعجم القرآن على لسانه، فلم يدرِ ما يقول، فليضطجع‏"‏ ‏(‏‏(‏رواه مسلم‏)‏‏)‏‏.‏