Muwatta Imam Malik (Riwayat Yahya)

Imam Malik, may Allah have mercy on him, said: Whoever wishes to wear such clothes that are not permissible in Ihram, or wishes to cut hair, or wishes to apply perfume without necessity, considering the expiation to be easy, then this is not permissible; rather, concession is only at the time of necessity. Whoever does so must give expiation.