The word "behold" here shows that Moses was surprised by what he saw.
# molded for yourselves a calf
The Israelites of the earlier generation had asked Aaron to make a metal calf so they could worship it. The full meaning of this statement can be made explicit. (See: [[rc://en/ta/man/translate/figs-explicit]])
# You had quickly turned aside out of the path that Yahweh had commanded you
Moses speaks as if obeying God's commands were walking along a path. See how you translated these words in [Deuteronomy 9:12](../09/12.md). Alternate translation: "You had quickly disobeyed what Yahweh had commanded you"