2 Nephi 5:31

Wherefore, I, Nephi, to be obedient to the commandments of the Lord, went and made these plates upon which I have engraven these things.

So I obeyed the Lord’s commands. I went and made these plates. I wrote these things on them.

So, obeying the Lord’s command, I went and made these plates and engraved these things on them.