Silsilat al-Ahadith al-Sahihah

Sayyiduna Dhirar bin Azwar (may Allah be pleased with him) says: Some of my family members sent me to the Noble Prophet (peace and blessings be upon him) with several or one milch she-camel. I brought it to the Prophet (peace and blessings be upon him). He instructed me to milk them, then said: "Leave (some) milk in the udders that will be a cause for more milk (to come)."