عَنْ أَنَسِ بْنِ مَالِكٍ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ كَانَ إِذَا دَعَا جَعَلَ ظَاهِرَ كَفَّيْهِ مِمَّا يَلِي وَجْهَهُ وَبَاطِنَهُمَا مِمَّا يَلِي الْأَرْضَ
It is narrated from Sayyiduna Anas bin Malik, may Allah be pleased with him, that when the Messenger of Allah, peace and blessings be upon him, would supplicate, the backs of his hands would be towards his face and the inner part of his palms would be towards the ground.