Silsilat al-Ahadith al-Sahihah

Abu Huraira (may Allah be pleased with him) narrates that people praised a funeral that passed by the Prophet (peace and blessings of Allah be upon him). The Prophet (peace and blessings of Allah be upon him) said: “(Paradise) has become obligatory.” After that, people spoke ill of another funeral that passed by, and upon hearing this, the Prophet (peace and blessings of Allah be upon him) said: “(Hell) has become obligatory.” And then he said: “You are witnesses over one another.”