Who was the first person to receive imputed righteousness?

Les teaches that the man who plunged the whole human race under the curse and made everyone a sinner by birth was also the first to experience imputed righteousness. The word “imputed” was a bookkeeping term in Paul’s day, meaning to put something to someone’s account. Genesis 3:21 records that the Lord God made coats of skins for Adam and his wife, implying a sacrificial animal was killed. That blood sacrifice satisfied God’s requirement and replaced the fig leaves, which were merely human effort. Les explains this was not primarily about physical clothing but a spiritual restoration of Adam and Eve into relationship with their Creator, because God receives lost persons only by the shedding of blood, as Hebrews 8 says: without shedding of blood there is no remission.