Now therefore take and prepare yourselves a new cart, and two milk cattle, on which there has come no yoke; and tie the cattle to the cart, and bring their calves home from them;
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.