Narrated Abdullah ibn Abbas: I came to the Prophet ﷺ from behind. I saw the whiteness of his armpits and he kept his arms away from his sides and raised his stomach (from the ground).
Explanation & Benefits
Shaykh Umar Farooq Saeedi
899. Commentary:
Shaykh al-Albani rahimahullah has authenticated it; the following hadith supports it.
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 899