It is from the Sunnah in prayer to place the palms upon the palms below the navel.
حدثنا عبد الله حدثنا محمد بن سليمان الأسدي لوين حدثنا يحيى بن أبي زائدة حدثنا عبد الرحمن بن إسحاق عن زياد بن زيد السوائي عن أبي جحيفة
إن من السنة في الصلاة وضع الأكف على الأكف تحت السرة
Its isnad is daif. Abdul-Rahman bin Ishaq Abu Shayba Wasiti Kufi is daif, Ibn Saad, Abu Dawud, Nasai and others declared him daif, and Bukhari said in al-Duafa 21, Ahmad said, "He is one whose hadith is rejected."Ziyad bin Zayd Suwai is unknown.The hadith was narrated by Abu Dawud 1:274 through Hafs bin Ghiyath from Abdul-Rahman bin Ishaq.This hadith and the one before it are among the additions of Abdullah.