(162) باب فِي التَّخَصُّرِ وَالإِقْعَاءِ
Narrated Abdullah ibn Umar:
Sa'id ibn Ziyad ibn Subayh al-Hanafi said: I prayed by the side of Ibn Umar and I put my hands on my waist. When he finished his prayer, He said: This is a cross in prayer; the Messenger of Allah (ﷺ) used to forbid it.
Reference: Sunan Abi Dawud 903
In-book reference: Book 2, Hadith 513
English translation: Book 3, Hadith 902