Sunan Ibn Majah — Establishing the Prayer and the Sunnah Regarding Them — Hadith No: 1302
Translation
It was narrated that ‘Amir said:“Iyad Al-Ash’ari was in Anbar at the time of ‘Eid, and he said: ‘Why is it that I do not see you engaged in Taqlis* as was done in the presence of the Messenger of Allah (ﷺ)?’” *Taqlis means to indulge in celebrations on a festive occasion