Jami At Tirmidhi
3579
Sahih+3

Abu Umamah [may Allah be pleased with him] said:`Amr bin `Abasah reported to me that he heard the Prophet (ﷺ) say: “The closest that the Lord is to a worshipper is during the last part of the night, so if you are able to be of those who remember Allah in that hour, then do so.”

SahihAhmad Muhammad Shakir
SahihAl-Albani