Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates this statement of the Prophet Muhammad (peace and blessings be upon him): "Whenever some people gather at a place and do not remember Allah there, nor do they send blessings upon the Prophet Muhammad (peace and blessings be upon him), then this will be a cause of regret for them on the Day of Resurrection, even if they are admitted into Paradise for reward."