Jami` at-Tirmidhi 2014
جامع الترمذي#2014SahihIbn 'Abbas narrated:"The Messenger of Allah sent Mu'adh [bin Jabal] to Yemen, and said: 'Beware of the supplication of the oppressed; for indeed there is no barrier between it and Allah
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
Bashar Awad MaaroufHasan Sahih
Zubair Ali ZaiSahih Bukhari
In-book reference: 27:120