Sahih al-Bukhari 5653

ʿAbd Allāh ibn Yūsuf narrated to us: al-Layth narrated to us; he said: Ibn al-Hād narrated to me, from ʿAmr, the freedman of al-Muṭṭalib, from Anas ibn Mālik (may Allah be pleased with him), who said: I heard the Prophet ﷺ say, “Allah says: ‘When I test My servant by taking his two beloved ones, and he is patient, I will compensate him for them with Paradise.’” He meant his eyes.

Ashʿath ibn Jābir and Abū Ẓilāl also transmitted it from Anas, from the Prophet ﷺ.