Whoever Believes in Allah and the Last Day
Reference: Sahih al-Bukhari 6018
مَنْ كَانَ يُؤْمِنُ بِاللَّهِ وَالْيَوْمِ الآخِرِ فَلْيَقُلْ خَيْرًا أَوْ لِيَصْمُتْ
English meaning
Whoever believes in Allah and the Last Day, let him speak good or remain silent. Whoever believes in Allah and the Last Day, let him be generous to his neighbor. Whoever believes in Allah and the Last Day, let him be generous to his guest.
Key lesson
Speech should be controlled — if it is not good, silence is better.
Practical application
Before speaking, ask yourself: Is it true? Is it kind? Is it necessary?