The Prophet ﷺ said: Two Muslims will not meet and shake hands having their sins forgiven them before they separate.

قَالَ رَسُولُ اللَّهِ ﷺ مَا مِنْ مُسْلِمَيْنِ يَلْتَقِيَانِ فَيَتَصَافَحَانِ إِلاَّ غُفِرَ لَهُمَا قَبْلَ أَنْ يَفْتَرِقَا