'Under the Law' in the Bible

And he was led by the Holy Spirit into the Temple, and when Joseph and Mary brought the baby Jesus in, so they could do to Him what was customary under the law of Moses,

For this reason, the promise [i.e., of being made right with God] comes through faith [in God], according to His unearned favor, so that it may be [given] with certainty to all of Abraham's descendants. The promise is given not only to those [who live] under the law [i.e., the Jews], but also to [all] those [who live] by faith, like Abraham. Abraham is the [spiritual] father of all of us [believers],

Christ set us free [from condemnation under the law of Moses], so we could stay free! Remain where you are then, and do not get tangled up again in the enslaving harness [of the law of Moses].