Hadith 31-311

وَبِإِسْنادِهِ عَن الحُسَيْنِ بْنِ عَلِى‏ عَلَيْهِ السَّلامُ قالَ: خَطَبَنا أَمِيرُ الْمُؤْمِنين‏ عَلَيْهِ السَّلامُ فَقالَ: سَلُّونِي عَن القُرآنِ أَخْبَركُم عَنْ آياتِه فِيمَنْ نَزَلَت وَأَيْنَ نَزَلَت.

According to the same documentation, on the authority of Al-Husayn ibn Ali (a.s.), “The Commander of the Faithful (a.s.) delivered a sermon for us and said, ‘Ask me about the Qur’an so that I may inform you regarding to whom the verses have been revealed and where the verses have been revealed.’”