وَحَدَّثَنِي عَنْ مَالِكٍ، عَنِ ابْنِ شِهَابٍ، عَنْ عَطَاءِ بْنِ يَزِيدَ اللَّيْثِيِّ، عَنْ أَبِي أَيُّوبَ الأَنْصَارِيِّ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ لاَ يَحِلُّ لِمُسْلِمٍ أَنْ يُهَاجِرَ أَخَاهُ فَوْقَ ثَلاَثِ لَيَالٍ يَلْتَقِيَانِ فَيُعْرِضُ هَذَا وَيُعْرِضُ هَذَا وَخَيْرُهُمَا الَّذِي يَبْدَأُ بِالسَّلاَمِ ‏"‏ ‏.‏

Yahya related to me from Malik from Ibn Shihab from Ata ibn Yazidal-Laythi from Abu Ayyub al-Ansari that the Messenger of Allah, mayAllah bless him and grant him peace, said, "It is not halal for amuslim to shun his brother for more than three nights, that is theymeet, and this one turns away and that one turns away. The better ofthe two is the one who says the greeting first." Translation Not Available

Book Ref: Muwatta Imam Malik Book 47 Hadith 1648
Web Ref:  Muwatta Imam Malik Book 47 Hadith 13