It wasnarrated from Abu Hurairah that the Prophet (ﷺ) said:
"Whenanyone of you gets up to pray at night, and his tongue stumbles overthe words of the Qur'an, and he does not know what he is saying,lethim lie down."
English reference: Vol. 1, Book 5, Hadith 1372
Arabic reference: Book 5, Hadith 1434