Silsilat al-Ahadith al-Sahihah

The Messenger of Allah (peace and blessings be upon him) said: "All the days of Tashreeq are days of sacrifice." This hadith is narrated from Sayyiduna Jubair bin Mut'im, Sayyiduna Abu Sa'id Khudri, or Sayyiduna Abu Hurairah, and another companion of the Messenger (may Allah be pleased with them all).