Sahih Muslim 2562
Sahih Muslim · Book 45: The Book of Virtue, Enjoining Good Manners, and Joining of the Ties of Kinship · The Prohibition Of Forsaking Someone For More Than Three Days For No Legitimate Reason
Abu Huraira reported Allah's Messenger (ﷺ) as saying:
حَدَّثَنَا قُتَيْبَةُ بْنُ سَعِيدٍ ، حَدَّثَنَا عَبْدُ الْعَزِيزِ، - يَعْنِي ابْنَ مُحَمَّدٍ - عَنِ الْعَلاَءِ ، عَنْ أَبِيهِ ، عَنْ أَبِي هُرَيْرَةَ ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ " لاَ هِجْرَةَ بَعْدَ ثَلاَثٍ " .
There should be no estranged relations beyond three days.