The Prophet ﷺ said, "Intercede and you will be rewarded, and Allah will decree through His Prophet's tongue whatever He wills."
حدثنا محمود بن غيلان والحسن بن علي وغير واحد قالوا حدثنا أبو أسامة عن بريد بن عبد الله بن أبي بردة عن جده أبي بردة
عن النبي ﷺ قال اشفعوا ولتؤجروا وليقض الله على لسان نبيه ما شاء
Agreed upon. Bukhari also reported it in the Book of Manners, chapter "The saying of Allah the Exalted, "Whoever intercedes with a good intercession will have a share from it" [Nisa 4:85]," hadith no. 6028, from the hadith of Abu Usama, and Muslim, no. 2627, from the hadith of Buraid bin Abdullah, with the same chain.