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].
App reference: Book 9, Hadith 196
Arabic/English book reference: Book 9, Hadith 1186