Adam and Eve's nakedness
And the man and his wife were both naked and were not ashamed. (Genesis 2:25)
Their eyes were opened when they ate of the tree of the knowledge of good and evil and tried to cover up with fig leaves. They hid from the Lord and admitted it was because they were naked. The Lord asked who told them they were naked then covered them in garments of skins. (Genesis 3)
Noah's nakedness
Noah became a man of the soil and planted a vineyard. He became drunk and lay uncovered in his tent. Ham saw his father's nakedness and told his brothers. Shem and Japheth took a garment, laid it on both their shoulders, and walked backwards to cover the nakedness of their father without looking upon him.
When Noah awoke and knew what his youngest son did, he said, “Cursed be Canaan; / a servant of servants shall he be to his brothers.” He also said, “Blessed be the Lord, the God of Shem; / and let Canaan be his servant. / May God enlarge Japheth, / and let him dwell in the tents of Shem, / and let Canaan be his servant.”
(Genesis 9)