(122) باب وَضْعِ الْيُمْنَى عَلَى الْيُسْرَى فِي الصَّلاَةِ
Zur'ah b. 'Abd al-Rahman said:
I heard Ibn al-Zubair say: Setting the feet right and placing one hand on the other is a sunnah.
Reference: Sunan Abi Dawud 754
In-book reference: Book 2, Hadith 364
English translation: Book 2, Hadith 753