And the man looking with attention at her, being silent to know whether Jehovah prospered his way or not

and he saith unto me, Jehovah, before whom I have walked habitually, doth send His messenger with thee, and hath prospered thy way, and thou hast taken a wife for my son from my family, and from the house of my father;

And he will say to them, Ye shall not delay me, and Jehovah prospered my way send me forth, and I shall go to my lord.

Therefore the man Jacob prospered so much that he had large flocks, female and male servants, as well as camels and donkeys.

The prison warden did not have to worry about anything under Joseph's care, because the LORD was with him. That's why Joseph prospered in everything he did.