It is narrated from Sayyiduna Abu Hurairah, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, said: "Those people who sit in a gathering and neither remember Allah in it nor send blessings upon the Prophet, that gathering will be a cause of regret for them on the Day of Resurrection, even if they enter Paradise (on account of their faith and other deeds)."