Jami` at-Tirmidhi 258

جامع الترمذي#258Sahih

Abu Abdur-Rahman As-Sulami said:"Umar bin Al-Khattab [may Allah be pleased with him] said to us: 'The knees are the Sunnah for you, so hold the knees

Scholarly Authentication

We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:

Ahmad Muhammad ShakirSahih Isnaad
Al-AlbaniSahih Isnaad
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih

In-book reference: 2:110