Abdullah 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”"
SahihSahihIsnaad SahihBook 3 · Hadith 26