Musannaf Ibn Abi Shayba 13:487

Abu Bakr narrated to us, he said: Waki’ narrated to us, from Isra’il, from Ibrahim ibn ‘Abd al-A’la, from Suwayd ibn Ghafala, who said: There is no harm in [exchanging] a horse for two horses, or an animal for two animals, hand-to-hand.