رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 860
The Book of Greetings
The Excellence of Greeting the Acquaintance Repeatedly
وَعَنْهُ عَنْ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، قَالَ: إِذَا لَقِيَ أَحَدُكُمْ أَخَاهُ، فَلْيُسَلِّمْ عَلَيْهِ، فَإِنْ حَالَتْ بَيْنَهُمَا شَجَرَةٌ، أَوْ جِدَارٌ، أَوْ حَجَرٌ، ثُمَّ لَقِيَهُ، فَلْيُسَلِّمْ عَلَيْهِ ((رَوَاهُ أَبُو دَاوُد)).
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) said, "When one of you meets a brother (in Faith) he should greet him. Then if a tree or a wall or a stone intervenes between them and then he meets him again, he should greet him." [Abu Dawud].
Riyad as-Salihin, 860