Sunnah Hadith
• Smiling in social interaction
Authentic
تَبَسُّمُكَ فِي وَجْهِ أَخِيكَ لَكَ صَدَقَةٌ
Tabassumuka fi wajhi akhika laka sadaqah.
"Your smiling in the face of your brother is charity for you."
Narrated by: Abu Dharr
Jami at-Tirmidhi 1956