Sulaiman bin al-Mughira al-Qaysy سليمان بن المغيرة القيسي مولاهم · General Behavior (Kitab Al-Adab)

When one of you meets his brother, he should salute him, then if he meets him again after a tree, wall or stone has come between them, he should also salute him. Mu'awiyah said: 'Abd al-Wahhab b. Bakht transmitted a similar tradition to me from Abu al-Zinad, from al-A'raj, from Abu Hurairah, from the Messenger of Allah (ﷺ).