[30]. Muhammad, God's messenger, peace and blessings be upon him, said: “The rights of a believer over another are six.” It was said: What are they, O Messenger of God? He said: “If you meet him, greet him; if he invites you, accept the invitation; if he asks for advice, give him sincere advice; if he sneezes and praises Allāh (by saying Al-Hamdulillaah), say Yarhamukallaah (may Allāh have mercy on you); if he falls sick, visit him; and if he dies, attend his funeral.”