Hadith 1590
وَعَنْ أَنَسٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى الله عَلَيْهِ وَسلم: «العيادة فوَاق نَاقَة»
Anas reported God's messenger as saying, “A visit should last as long as the time between the two milkings of a she-camel.”(The reference is to the practice of drawing some milk from the camel, then leaving her for a little for her young to suck milk. When she then let her milk flow copiously she was milked again.)
