Musnad Ahmad 1153:1559

Yahya ibn Sa'id narrated to us, from Zakariyya, who said: 'Amir narrated to us, from Masruq, from Aisha, who said: "I used to twist the garlands for the sacrificial animals (hady) of the Messenger of Allah, may Allah bless him and grant him peace, and he would send them, and he would not refrain from anything (that is permitted to a person in ihram)."