Genesis 39:4

He served him, not now as a slave, but in a higher degree. All that he had he put into his hand, i.e. committed to his care and management, as Genesis 16:6. Object. How could this be, when Joseph understood not the Egyptian tongue? Answ. Joseph doubtless when he came thither did as much as possibly he could endeavour to get the knowledge of that language, and being a person of excellent parts, would soon obtain it, especially because of the great affinity between that language and his own. Nor must we think that Joseph was thus highly advanced in an instant, but by degrees, step by step, and after some considerable time.