Prostration and its Excellence - Section 1 Mishkat al-Masabih 894
Arabic hadith text
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «أَقْرَبُ مَا يَكُونُ الْعَبْدُ مِنْ رَبِّهِ وَهُوَ ساجد فَأَكْثرُوا الدُّعَاء» . رَوَاهُ مُسلم
Translation
Abu Huraira reported God’s Messenger as saying, “The nearest a servant comes to his Lord is when he is prostrating himself, so make supplication often.” Muslim transmitted it.