Jubayr bin Hayya al-Thaqafi · The Book of Funerals

"The believer owes six duties toward his fellow believer: To visit him when he is sick, to attend his funeral when he dies, to accept his invitation, to greet him with Salam when he meets him, to reply to him (say: Yarhamuk Allah, may Allah have mercy on you) when he sneezes and to be sincere to him, whether he is absent or present." (Hasan).

"The Messenger of Allah said: "The rider should travel behind the Janazah and the pedestrian may travel wherever he wishes, and the (funeral) prayer should be offered for a child."'