3-31 Muhammad ibn Musa ibn al-Mutevakil - may God be pleased with him - narrated that Abdullah ibn Ja’far al-Homayry quoted Muhammad ibn al-Hussein ibn Abil-Khat’tab who linked it up through a chain of narrators to Imam as-Sadiq (MGB) saying,

“Do not greet those who are attending a funeral procession, those who are going to the congregational prayers, and those who are in the bath.”