Jami` at-Tirmidhi 259
جامع الترمذي#259SahihSa'd bin Abi Waqas said:"We would do that, but then we were prohibited from it, and we were ordered to put our hands on our knees
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih
Al-AlbaniSahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 2:111