Riyad as-SalihinChapter 16Hadith 819
Full Sharh — Riyad as-Salihin 819
وعن أبي هريرة رضي الله عنه أن رسول الله صلى الله عليه وسلم قال: "أقرب ما يكون العبد من ربه وهو ساجد، فأكثروا الدعاء" ((رواه مسلم)).
English Translation
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.".
Source
Riyad as-Salihin(رياض الصالحين)
The Book of Du'a (Supplications)
Hadith Number
819