Your smile is a charity
تَبَسُّمُكَ فِي وَجْهِ أَخِيكَ لَكَ صَدَقَةٌ
Tabassumuka fi wajhi akhika laka sadaqah.
"Your smile toward your brother is a charity."
Narrated by Abu Dharr. Jami' at-Tirmidhi 1956 (sahih)
A short reflection
Sadaqah doesn't need a wallet. A warm face given to a tired stranger counts.