looking at a believer’s face

نظَرُ الْمُؤْمِنِ فِى وَجْهِ أخِیهِ الْمُؤْمِنِ لِلْمَوَدَّهِ وَالْمَحَبَّهِ لَهُ عِبادَه

Imam Sajjad (as) states: looking at a believer’s face with love and affection is an act of worship

Bihar- Al-Anwar, Vol 78, p.140, Hadith no. 3