Muwatta Malik #488
The Qur'an
The Arabic includes the chain of narration (sanad) and the collector's commentary; the English translation shows the Prophet's words only.
وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، مَكَثَ عَلَى سُورَةِ الْبَقَرَةِ ثَمَانِيَ سِنِينَ يَتَعَلَّمُهَا .
Yahya related to me from Malik that he had heard that it took
Abdullah ibn Umar eight years to learn Surat al-Baqara. (Sura 2)
About Muwatta Malik
This hadith is #488 from Muwatta Malik, in the Book of The Qur'an.