It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) said: "Do not milk the animals of people for your own use without their permission. Would any one of you like that someone goes to his upper room, breaks open the door of his storehouse, and takes everything out of it? Remember! In the udders of people's animals is their food, so the milk of someone's animal should not be milked without his permission."