What is a forbidden act in Abrahams test?

In the Abrahamic traditions (Judaism, Christianity, and Islam), Abraham's test (as described in Genesis 22) involves God commanding Abraham to sacrifice his son Isaac. The forbidden act in this context is the killing of Isaac. While the command itself comes from God, the act of sacrificing Isaac is generally considered a violation of the sanctity of human life, a principle deeply rooted in these religions. The prohibition against murder is a central tenet. The story ultimately serves to highlight Abraham's faith and God's mercy, with the sacrifice being averted at the last moment.