Sa'id bin Yasar (may Allah have mercy on him) relates: I saw a man of the tribe of Juhaynah; I had never seen a person bigger in build or taller than him. That man related: I came to the Prophet (peace and blessings be upon him) during a time of famine or severe hardship that had afflicted the people. The Messenger of Allah (peace and blessings be upon him) said to his Companions: "Divide these people among yourselves (as guests)." So one man would take the hand of one person, and another would take the hands of two, while the people avoided me on seeing my height and unusual size. Then the Messenger of Allah (peace and blessings be upon him) took my hand and took me to his house. There he (peace and blessings be upon him) milked a goat and I drank its milk; then he (peace and blessings be upon him) milked another and I drank that too, until he (peace and blessings be upon him) had milked seven goats for me in succession (and I drank them all). He related: Then I left, and when the next day came I accepted Islam. Then I came again, and he (peace and blessings be upon him) milked only one goat for me, from which I was fully satisfied and my thirst was quenched. I said: "By Allah, O Messenger of Allah (peace and blessings be upon him)! I have never before today been satisfied and content like this." At this the Messenger of Allah (peace and blessings be upon him) said: "The believer drinks in one intestine, while the disbeliever drinks in seven intestines."
This hadith is sahih. Ahmad recorded it through this same chain, but instead of the complete long story he mentioned only the last part of the hadith.
Hadith Referenceالمطالب العالية بزوائد المسانيد الثمانية / كتاب الأطعمة والأشربة / 2438
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij«حکم الحدیث المطالب العالیہ محققاً تنسیق د. سعد بن ناصر بن عبد العزيز الشَّثري- مکتبہ شاملہ :قال ابن حجر: هَذَا حَدِيثٌ صَحِيحٌ ، أَخْرَجَهُ أَحْمَدُ مِنْ هَذَا الْوَجْهِ الْأَخِيرِ مِنْهُ دُونَ الْقِصَّةِ بِطُولِهَا . » «أخرجه مسند أحمد برقم: 23605، وأخرجه شرح مشكل الآثار للطحاوي برقم: 2014»