Amr bin al-Sharid quoted his father al-Sharid bin Suwaid as saying: The Messenger of Allah ﷺ came upon me when I was sitting thus: having my left hand behind my back and leaning on the fleshy part of it, and said: Are you sitting in the manner of those with whom Allah is angry?
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues:
It is disliked (makruh) to sit by placing one's hand on the ground behind the back.
Some have declared this narration to be authentic; see: (Hijab al-Mar’ah by al-Albani: 2/100)
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 4848