عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ أَبِي نَصْرٍ عَنِ الرِّضَا ( عليه السلام )
قَالَ إِذَا أَكَلْتَ شَيْئاً فَاسْتَلْقِ عَلَى قَفَاكَ وَ ضَعْ رِجْلَكَ الْيُمْنَى عَلَى الْيُسْرَى .
21. A number of our people have narrated from Sahl ibn Ziyad from Ahmad ibn Muhammad from ibn abu Nasr who has said the following: “Abu al-Hassan, al-Rida’ 
, has said,
‘When you eat [something], then lie down on your back, then place your right leg on your left leg.’”
