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 a milch she-camel. I brought it to him. The Prophet (peace and blessings be upon him) ordered me to milk it. Then he said: Leave (some) milk in the udder that will be a cause for (more) milk to come.
Hadith Referenceالفتح الربانی / كتاب الاشربة / 7480
Hadith Gradingمحدثین:ضعیف
Hadith Takhrij«اسناده ضعيف لجھالة حال يعقوب بن بحير، أخرجه البخاري في التاريخ الكبير : 4/ 339، والطبراني في الكبير : 8129، (انظر مسند أحمد ترقيم الرسالة: 16704 ترقیم بيت الأفكار الدولية: 16824»
Brief Explanation
Benefits: … The meaning of this hadith is that the one who is milking should leave some amount of milk remaining in the udders and should not squeeze them completely, because the milk that remains in the udders after milking will become a cause for more milk to descend, and if the udders are completely squeezed, the next milk will descend only after a considerable delay.