And Zaid bin Thabit (may Allah be pleased with him) said that by performing the prayer, you have fulfilled your duty. Humaid bin Hilal (Tabi'i) said that after performing the funeral prayer, we do not consider it necessary to seek permission (to leave). Whoever performs the funeral prayer and then returns, he receives the reward of one qirat.

Narrated Nafi`: Ibn `Umar was told that Abu Huraira said, "Whoever accompanies the funeral procession will have a reward equal to one Qirat." Ibn `Umar said, "Abu Huraira talks of a too enormous reward."