God asked Abraham to sacrifice his only son (i.e. the son of promise) Isaac. Abraham didn’t question the Lord and was willing to sacrifice Isaac on the side of a mountain. The Lord stopped him and told him to sacrifice the ram that was caught in the bushes.
What are you willing to sacrifice to the Lord? A better question would be what are you withholding from sacrificing to the Lord? The Lord has asked you to “give up” something. We have a tendency to “hold on” to that thing that we have been praying for so diligently and fervently. Do not love that thing more than you love the Lord!!!