Fortress of the Muslim
Hisn al-Muslim 244
Arabic hadith text
إِذَا رَأَى أَحَدُكُم مِنْ أَخِيهِ، أَوْ مِنْ نَفْسِهِ، أَوْ مِنْ مَالِهِ مَا يُعْجِبُهُ [فَلْيَدْعُ لَهُ بِالْبَرَكَةِ] فَإِنَّ الْعَيْنَ حَقٌّ
Translation
If one of you sees something about his brother, himself, or his wealth that he admires [let him pray for blessing for it], for the evil eye is real.