Perfection of Islam

In an authentic/Sahih Hadith – Imam Zayn al-Abidin = the son of Imam al-Husayn, Alayhimus Salam, narrated:

The Messenger of Allah, peace and blessings be upon him, his family and companions, said:

إِنَّ مِنْ حُسْنِ إِسْلَامِ الْمَرْءِ تَرْكَهُ مَا لَا يَعْنِيهِ

“Most certainly, part of the perfection of Islam is for a person to leave what does not concern him.”

(Sunan al-Tirmidhi – Sahih/Authentic Hadith)