The Book of Drinks
51/57. Chapter:
Different Reports From Ibrahim Concerning Nabidh
Sunan an-Nasai
أَخْبَرَنَا عُبَيْدُ اللَّهِ بْنُ سَعِيدٍ، قَالَ سَمِعْتُ أَبَا أُسَامَةَ، يَقُولُ مَا رَأَيْتُ رَجُلاً أَطْلَبَ لِلْعِلْمِ مِنْ عَبْدِ اللَّهِ بْنِ الْمُبَارَكِ الشَّامَاتِ وَمِصْرَ وَالْيَمَنَ وَالْحِجَازَ .
'Ubaidullah bin Sa'eed said: "I heard Abu Usamah say: 'I never saw any man more assiduous in seeking knowledge than 'Abdullah bin Al-Mubarak, not in Ash-Sham, Egypt, Yemen or the Hijaz.'"
Reference : Sunan an-Nasa'i 5752In-book reference : Book 51, Hadith 214English translation : Vol. 6, Book 51, Hadith 5755