Jami` at-Tirmidhi 2986
جامع الترمذي#2986SahihNarrated Zaid bin Arqam:"During the time of the Messenger of Allah (ﷺ), we would talk during Salat, so 'And stand before Allah with obedience (2:238) was revealed, ordering us to be silent." (Another chain) with similar wordings, but he added: "And we were forbidden from talking
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih - Agreed Upon
In-book reference: 47:38