On Miscellaneous Topics
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 28
وَ رُوِيَ: «أَنَّهُ يَكْتُبُ اَللَّهُ عَزَّ وَ جَلَّ لَهُ بِعَدَدِ كُلِّ شَعْرَةٍ مَرَّتْ عَلَيْهَا يَدُهُ حَسَنَةً.
It is reported: "Allah سبحانه وتعالى, the Mighty and Majestic, writes for the person, for every strand of hair that their hand passes over (on the head of the orphan), a good deed."
- Ṣaḥīḥ al-Faqīh