Abu Hurairah (May Allah be pleased with him) reported:
The Messenger of Allah (ﷺ) said, "A slave becomes nearest to his Rubb when he is in prostration. So increase supplications in prostrations."[Muslim]. (IT)
App reference (IT): Book 17, Hadith 34 (IT)
Arabic/English book reference (IT): Book 17, Hadith 1498 (IT)