Adam Clarke on Genesis 41:38

In whom the Spirit of God is? - רוח אלהים ruach Elohim, the identical words used Gen 1:2; and certainly to be understood here as in the preceding place. If the Egyptians were idolaters, they acknowledged Joseph's God; and it is not to be supposed that they only became acquainted with him on this occasion. The knowledge of the true God was in Egypt long before; but it is very likely that though they acknowledged his influence with respect to Joseph, as they saw most clearly that he acted under an influence far beyond that of their magicians, for he interpreted dreams which they could not; yet they might, notwithstanding, have their gods many and their lords many at this time, for we know that in religious matters they were exceedingly corrupt afterwards.