إِذَا صَافَحَ الرَّجُلُ صَاحِبَهُ، فَالَّذِي يَلْزَمُ التَّصَافُحَ أَعْظَمُ أَجْراً ذِي يَدَعُ، أَلَا وَ إِنَّ الذُّنُوبَ لَتَتَحَاتُ فِيمَا بَيْنَهُمْ حَتّى لَايَبْقى ذَنْبٌ.
Imam al-Kazim (as):
When a man shakes his companion’s hand, the one who holds on the longest has the greater reward than the one who lets go. Indeed sins fall off from between them [as a result of it] until finally no sin remains.
Source:
al-Kāfī
Vol3
P464
ID: 16865