Narrated Nafi`:

Whenever Ibn `Umar recited the Qur'an, he would not speak to anyone till he had finished his recitation. Once I held the Qur'an and he recited Surat-al-Baqara from his memory and then stopped at a certain Verse and said, "Do you know in what connection this Verse was revealed? " I replied, "No." He said, "It was revealed in such-and-such connection." Ibn `Umar then resumed his recitation. Nafi` added regarding the Verse:--"So go to your tilth when or how you will" Ibn `Umar said, "It means one should approach his wife in .."

حَدَّثَنَا إِسْحَاقُ، أَخْبَرَنَا النَّضْرُ بْنُ شُمَيْلٍ، أَخْبَرَنَا ابْنُ عَوْنٍ، عَنْ نَافِعٍ، قَالَ كَانَ ابْنُ عُمَرَ ـ رضى الله عنهما ـ إِذَا قَرَأَ الْقُرْآنَ لَمْ يَتَكَلَّمْ حَتَّى يَفْرُغَ مِنْهُ، فَأَخَذْتُ عَلَيْهِ يَوْمًا، فَقَرَأَ سُورَةَ الْبَقَرَةِ حَتَّى انْتَهَى إِلَى مَكَانٍ قَالَ تَدْرِي فِيمَا أُنْزِلَتْ‏.‏ قُلْتُ لاَ‏.‏ قَالَ أُنْزِلَتْ فِي كَذَا وَكَذَا‏.‏ ثُمَّ مَضَى‏.‏ وَعَنْ عَبْدِ الصَّمَدِ، حَدَّثَنِي أَبِي، حَدَّثَنِي أَيُّوبُ، عَنْ نَافِعٍ، عَنِ ابْنِ عُمَرَ، ‏{‏فَأْتُوا حَرْثَكُمْ أَنَّى شِئْتُمْ‏}‏ قَالَ يَأْتِيهَا فِي‏.‏ رَوَاهُ مُحَمَّدُ بْنُ يَحْيَى بْنِ سَعِيدٍ عَنْ أَبِيهِ عَنْ عُبَيْدِ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ‏.‏
USC-MSA web (English) reference : Vol. 6, Book 60, Hadith 50
Arabic reference : Book 65, Hadith 4526