And they departed from the mount of the LORD three days' journey: and the ark of the covenant of the LORD went before them in the three days' journey, to search out a resting place for them. The ark - went before them - We find from Numbers 10:21 that the ark was carried by the Kohathites in the center of the army; but as the army never moved till the cloud was taken up, it is said to go before them, i. e., to be the first to move, as without this motion the Israelites continued in their encampments.
Related Commentaries of Numbers 10:33
Numbers 10:33
33 And they departed from the mount of the LORD three days' journey: and the ark of the covenant of the LORD went before them in the three days' journey, to search out a resting place for them.