Why would you even think such a thing? During Jesus life here on this sinful planet He lived under the old covenant as did all He taught. Paul lived under both the old and new covenants. We are not privy as to how Jesus taught Paul, but we do know after his experience while traveling to Damascus he received the Holy Spirit at his conversion. We all need to remember that Jeremiah's prophecy said the new covenant would not be like the old one.
Yes, what Paul taught and recorded in the Holy Writ was new and different from what Jesus taught. I will quote Eph 214
For he himself is our peace, who has made the two groups one and has destroyed the barrier, the dividing wall of hostility, 15 by setting aside in his flesh the law with its commands and regulations. His purpose was to create in himself one new humanity out of the two, thus making peace, Those who are teaching that we are somehow under the dictates of the old covenant are denying that we are under the new and final covenant God will ever give to mankind on this Earth. God's covenant to Israel was exclusive to Israel. No other nation on Earth was subject to that covenant. The new and better covenant is inclusive for all nations on this Earth. To deny what Paul and the other New Testament writers taught is denying what Jesus came and suffered for all mankind. Old covenant ritual laws are past. Laws dealing with morality are forever. They were part of the old covenant and are prominent in the new, LOVE.
Yep, the greatest command ever given is to love others as Jesus loves us. Love was
NOT one of the ten commands.
1 Corinthians 13:1
If I speak in the tongues of men or of angels, but do not have
love, I am only a resounding gong or a clanging cymbal.
1 Corinthians 13:2
If I have the gift of prophecy and can fathom all mysteries and all knowledge, and if I have a faith that can move mountains, but do not have
love, I am nothing.
1 Corinthians 13:3
If I give all I possess to the poor and give over my body to hardship that I may boast, but do not have
love, I gain nothing.
1 Corinthians 13:4
Love is patient,
love is kind. It does not envy, it does not boast, it is not proud.
1 Corinthians 13:6
Love does not delight in evil but rejoices with the truth.
1 Corinthians 13:8
Love never fails. But where there are prophecies, they will cease; where there are tongues, they will be stilled; where there is knowledge, it will pass away.
Gal5:18 But if you are led by the Spirit, you are not under the law.
Once again, I refute that line of reasoning. They are not about loving anything. They are commands and commands cannot dictate love. Love comes from our hearts and prompted by the Holy Spirit. Love covers all aspects of morality.