Musannaf Ibn Abi Shayba 13:477

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Sufyan, from Isma’il bin Umayyah, from a man, from Sa’id bin al-Musayyib, he said: There is no harm in [exchanging] one Coptic garment for two Coptic garments.