Ibn 'Umar told that he heard God's messenger say, "While I was asleep I was brought a jug of milk and drank till I could see what was drunk coming out at my nails. Then I gave what I had left to `Umar b. al-Khattab." He was asked how he interpreted it and replied that it meant knowledge. (Bukhari and Muslim.)
Hadith Referenceمشكوة المصابيح / كتاب المناقب / 6039
Hadith Gradingالألبانی:مُتَّفَقٌ عَلَيْهِ | زبیر علی زئی:متفق عليه
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «متفق عليه، رواه البخاري (3681) و مسلم (16/ 2391)»