Compiled by Imam Yahya ibn Sharaf al-Nawawi
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)).
The Messenger of Allah (ﷺ) said, "A slave becomes nearest to his Rubb when he is in prostration. So increase supplications in prostrations."[Muslim].