Abdullah bin Umar reported,

The Messenger of Allah ﷺ said, "It is not lawful for a believer to shun his brother for more than three days."

Muslim 6534

Sahih

حدثنا محمد بن رافع حدثنا محمد بن أبي فديك أخبرنا الضحاك وهو ابن عثمان عن نافع

عن عبد الله بن عمر

أن رسول الله ﷺ قال لا يحل للمؤمن أن يهجر أخاه فوق ثلاثة أيام

مسلم 6534صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Righteousness, maintaining ties, and good manners
Chapter
Prohibition of abandonment for more than three days without a legitimate excuse
Numbering
Darussalam 6534
Muslim 6534