1 Samuel 6:7

Now therefore make a new cart ,.... For there were no Levites, nor priests of the Lord to carry it upon their shoulders, as it was wont to be when carried, and therefore they ordered a cart to be made; and they might know the Levites were allowed wagons to carry some of their sacred things on, Numbers 7:1 and a new one for the honour of the ark, as David afterwards did, 2 Samuel 6:3 .

and take two milch kine, on which there hath come no yoke ; which also might be designed for the honour of the ark; but there was a further view in it, at least in the providence of God; since two such creatures, who had young, would be apt, if left to themselves, as these were, to return home to them, and not to proceed on a journey; and being unaccustomed to a yoke, would draw one way, and another another, in different ways; and not go on in a direct road, as such that are used to the yoke do:

and tie the kine to the cart ; in order to draw it:

and bring their calves home from them ; that they might not cry after them, which would cause them to turn back.