Who will go up for us to heaven and bring it down to us and make us able to hear it, so that we may do it?

Here Moses uses a rhetorical question to emphasize that the people of Israel think that Yahweh's commands are too difficult for them to know. This question can be translated as a statement. Alternate translation: "Someone must travel to heaven to learn God's commands and then return to tell us what they are so we can obey them." (See: rc://en/ta/man/translate/figs-rquestion)