Jami` at-Tirmidhi 182
جامع الترمذي#182SahihSmurah bin Jundub narrated that :the Prophet said: "Salatul-wusta is the Asr prayer
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Ahmad Muhammad ShakirSahih Lighairihi
Al-AlbaniSahih
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih
In-book reference: 2:34