In both Mark and Matthew, Yeshua is recorded as saying that a bit of marriage Law which in context is referred to as of divine origin was, in fact, a bit of legislating that Moshe did all by his lonesome.<quoted text>
Your proof is?
Generally, Yeshua taught from the prophets and was establishing a new "school" of prophets. He was also against the Levitical/Temple/Sadducee cult of atonement sacrifices, and made reference, through the prophets, back to pre-Mosaic systems. Ironically, his message was not Passover-based as much as it was Sabbath-based.
It has been suggested that one of Yeshua's prime missions was to bring to and end the entire concept of priestly blood sacrifice atonement, replacing it with "a humble and contrite heart", and heartfelt concern for others. This is born out by most of Mark and Matthew.
By the way, you mean to ask for "support", as in "supporting text" rather than "proof".
Yeshua pointedly said to Pharisees that the Mosaic records were corrupted and contradicted them regularly, usually by superseding their statements or requirements in attacks upon legalistic hypocrisies. He didn't establish stricter codes, he just demonstrated that inner honesty was absent, and that ANY "holier-than-thou" attitude could easily be out-holied by introspection and honesty. The point made was that legalism was NOT the path to his good graces. Honest, genuine and heartfelt concern for others, free from any thought of reward, was the criterion he would use.
Now THAT is a tight needle to thread!