Sahl ibn Hunayf reported: The Messenger of Allah, peace and blessings be upon him, said, “If one of you sees something from his brother, or in himself, or in his wealth which impresses him, then supplicate for him to be blessed in it. Verily, the evil eye of envy is real.”
Source: Musnad Aḥmad 15700
Grade: Sahih (authentic) according to Al-Albani
عَنْ سَهْلِ بْنِ حُنَيْفٍ قَالَ قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا رَأَى أَحَدُكُمْ مِنْ أَخِيهِ أَوْ مِنْ نَفْسِهِ أَوْ مِنْ مَالِهِ مَا يُعْجِبُهُ فَلْيُبَرِّكْهُ فَإِنَّ الْعَيْنَ حَقٌّ
15700 مسند أحمد بن حنبل
2572 المحدث الألباني خلاصة حكم المحدث صحيح في السلسلة الصحيحة
