«ما من مسلمين يلتقيان فيسلم أحدهما على صاحبه ويأخذ بيده لا يأخذ بيده إلا لله فلا يفترقان حتى يغفر لهما»
The Prophet (peace and blessings be upon him) said:
"When two Muslims meet, and one of them greets the other with salam and takes hold of his hand, and he takes his hand only for the sake of Allah, they do not part until they are forgiven."
Hadith Referenceصحیح الجامع الصغیر / حرف الميم / 5778