Musannaf Ibn Abi Shaybah

Hazrat Umair narrates that we used to give something as a gift, etc., to the goat herders on the condition that they would give us such and such amount of cheese, such and such amount of ghee, and such and such amount of a yellow liquid substance. Then I inquired about this from Hazrat Alqama, Hazrat Masrooq, and Hazrat Abdur Rahman bin Abi Laila. All of them forbade me from this.

Hazrat Umar (may Allah have mercy on him) said: A person asked Hazrat Ubaidah and, besides him, someone from among the companions of Hazrat Abdullah about this matter. They disliked it.