Imam Muslim narrated from the route of Abu Hurayrah may Allah reward him greatly that the Messenger of Allah (salla Allahu ^alayhi wasallam) said: <<The rights of the Muslim upon the Muslim are six." It was said, "And what are they O Messenger of Allah?" He replied, "When you meet him, give him the greeting of peace, when he invites you, respond to his invitation, when he seeks your advice, advise him, when he sneezes and praises Allah, supplicate for mercy upon him, when he becomes ill, visit him, and when he dies follow his funeral.>>