1 Samuel 6:7

Verse 1 Samuel 6:7. Make a new cart] It was indecent and improper to employ in any part of the worship of God any thing that had before served for a common purpose. Every thing in the worship of God is said to be sanctified: now the general meaning of that word is, to separate a thing from all earthly and common uses, and devote it solely to the service of God.

When David removed the ark from the house of Abinadab, he put it on a new cart, 2 Samuel 6:3.

Bring their calves home from them] So it appears that their calves had been with them in the fields. This was a complete trial: unless they were supernaturally influenced, they would not leave their calves; unless supernaturally directed, they would not leave their home, and take a way unguided, which they had never gone before.