Riyad as-Salihin

Ibn 'Abbas (May Allah be pleased with them) reported: Messenger of Allah (ﷺ) passed by the graves at Al-Madinah. He turned his face towards them and said, "May you be granted safety, O inmates of the graves. May Allah forgive us and you. You have preceded us, and we are to follow."

[At-Tirmidhi, who classified it as Hadith Hasan].