Jami` at-Tirmidhi 478
جامع الترمذي#478SahihAbdullah bin As-Sa'ib narrated:"Allah's Messenger would pray four (Rak'ah) after the Zawal of the sun before Az-Zuhr. He said: 'It is an hour in which the gates of the heavens are opened, and I love that a righteous deed should be raised up for me in it
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 ZaiIsnaad Sahih
In-book reference: 3:26