(12) باب النَّهْىِ عَنِ التَّخَصُّرِ، فِي الصَّلاَةِ
It was narrated from Abu Hurairah that:
The Prophet (ﷺ) forbade praying with one's hands on one's waist. (IT)
Reference (IT): Sunan an-Nasa'i 890 (IT)
In-book reference (IT): Book 11, Hadith 15 (IT)
English translation (IT): Vol. 2, Book 11, Hadith 891 (IT)