عَنْ ضِرَارِ بْنِ الْأَزْوَرِ رَضِيَ اللَّهُ عَنْهُ قَالَ بَعَثَنِي أَهْلِي بِلَقُوحٍ إِلَى النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَآلِهِ وَسَلَّمَ فَأَمَرَنِي أَنْ أَحْلِبَهَا فَحَلَبْتُهَا فَقَالَ دَعْ دَاعِيَ اللَّبَنِ
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.