Hadith 8:209
Abu Bakr narrated to us, he said: Abu al-Ahwas narrated to us, from Layth, from Tawus, who said: The muhrim (pilgrim in the state of ihram) shall not look into a mirror, and he shall not invoke [evil] against anyone, even if he (the other person) has wronged him.
حدثنا أبو بكر قال ثنا أبو الأحوص عن ليث عن طاوس قال لا ينظر المحرم في المرآة ولا يدعو على أحد وإن ظلمه