for the question to be appropriate.

What did the Prophet Muhammad (saw) forbid his followers to do on the day of Fitr and the day of Sacrifice ('Id-ul-Adha)?
 Abu Sa'id al-Khudri (Allah be pleased with him) reported that the Messenger of Allah (may peace be upon him) forbade to observe fast on two days the day of Fitr and the day of Sacrifice ('Id-ul-Adha).