If anyone of you is invited, let him answer the invitation. If he is fasting, let him supplicate (for the inviter); if he is not fasting, let him eat
Abu Hurayrah (may Allah be pleased with her) reported that the Prophet (may Allah's peace and blessings be upon him) said: "If anyone of you is invited, let him answer the invitation. If he is fasting, let him supplicate (for the inviter); if he is not fasting, let him…

