قَالَ رَسُولُ اللهِ ﷺ: «أقْرَبُ مَا يَكُونُ العَبْدُ مِنْ رَبِّهِ، وَ هُوَ سَاجِدٌ فَأكْثِرُوا الدُّعَاءَ»

The Messenger of Allāh \pbuh said : “The nearest a servant is to his Lord is when he is prostrating, so supplicate much therein.”

Reference: The Messenger of Allāh \pbuh said : “The nearest a servant is to his Lord is when he is prostrating, so supplicate much therein.” Muslim (#482, 1/350).