Genesis 2:25

ולא יתבוששו AND THEY WERE NOT ASHAMED — for they did not know what modestly meant, so as to distinguish between good and evil. Although he (Adam) had been endowed with knowledge to give names to all creatures, yet the evil inclination did not become an active principle in him until he had eaten of the tree, when it entered into him and he became aware of the difference between good and evil.

וַיִּֽהְי֤וּ שְׁנֵיהֶם֙ עֲרוּמִּ֔ים הָֽאָדָ֖ם וְאִשְׁתּ֑וֹ וְלֹ֖א יִתְבֹּשָֽׁשׁוּ׃

And they were both naked, the man and his wife, and they felt no shame.