Musannaf Ibn Abi Shaybah

Hazrat Hudhaifah (may Allah be pleased with him) bought a she-camel from two persons at the place of Nakha’, and made it a condition that they would be paid in cash with whatever both of them agreed upon. Then he brought them to his house and took out a pouch for them. They said, “These are counterfeit.” He then took out another pouch, and again they said, “These are counterfeit.” Hazrat Hudhaifah (may Allah be pleased with him) said, “By Allah, I am also one of you. I myself heard the Messenger of Allah (peace and blessings be upon him) say: Whoever makes a condition with his companion, and does not fulfill it for him, is like one whose neighbor is in trouble and he does not prevent it from him.”