(The established way of folding hands is) to hold the hands by the hands in prayer below the navel. Abu Dawud said: I heard Ahmad b. Hanbal say: The narrator 'Abd al-Rahman b. Ishaq al-Kufi is weak (i.e. not reliable).
أَبُو هُرَيْرَةَ أَخْذُ الأَكُفِّ عَلَى الأَكُفِّ فِي الصَّلاَةِ تَحْتَ السُّرَّةِ