Hadith 18905
It is narrated from Hazrat Dhirar bin Azwar (may Allah be pleased with him) that once my family sent me to the Noble Prophet (peace and blessings be upon him) with a milking she-camel. I presented myself, and the Noble Prophet (peace and blessings be upon him) instructed me to milk her. Then the Noble Prophet (peace and blessings be upon him) said: Leave enough milk in her udders so that it can be obtained again.