﴿ وَلَمَّا جَآءَ عِيسَىٰ بِٱلْبَيِّنَٰتِ قَالَ قَدْ جِئْتُكُم بِٱلْحِكْمَةِ وَلِأُبَيِّنَ لَكُم بَعْضَ ٱلَّذِى تَخْتَلِفُونَ فِيهِ ۖ فَٱتَّقُوا۟ ٱللَّهَ وَأَطِيعُونِ ﴾

“NOW WHEN Jesus came [to his people] with all evidence of the truth, he said: “I have now come unto you with wisdom, and to make clear Unto you some of that on which you are at variance: hence, be conscious of God, and pay heed unto me.”

وَلِأُبَيِّنَ لَكُم بَعْضَ الَّذِي تَخْتَلِفُونَ فِيهِ (and to explain to you some of those matters in which you differ...43:63) Since Bana Isra'il were drowned in arrogance and obstinacy, they had tampered with the Divine laws. Sayyidna ` Isa (علیہ السلام) disclosed the reality of such distortions. The words 'some matters' are used because some other matters were purely of mundane nature. He might have not felt the need to deal with those differences. (Bayan-ul-Qur an).