His body shall not remain all night upon the tree, but thou shalt in any wise bury him that day; (for he that is hanged is accursed of God ;) that thy land be not defiled, which the LORD thy God giveth thee for an inheritance. Deut. 21:23
The reference was to a man who for sin had been put to death, and whose body had been impaled on a tree or a stake, and thus exposed as a warning to other evil-doers. The command was that such exposure was not to outlast the day. By night the body must be buried, and so the whole fact of his sin, now expiated as to human society, put completely away. This parenthetical statement, for such it is, gives the reason for the burial. The man was not accursed of God because he was hanged on a tree. He was hanged on the tree because he was accursed of God.
The hanging was the outward sign of the curse upon him, the curse of death for sin. When that curse was accomplished and witnessed, the sign was to cease; then let the man be buried, and that burial is the sign that the curse was sufficient. The understanding of this helps us when the mind travels on in solemn thought to the One Who hung upon the Tree on Calvary. He was there because He was "made sin," and so accursed of God. Such blunt statement gives the soul a shock; but it is the very shock we need, if we are ever to come to anything like a true apprehension of the way of our saving. In His case this law was fulfilled. He did not remain on the Tree through the night. The curse on sin was carried out, and witnessed, the sin was expiated before God, and because the One Who suffered its penalty was sinless. His burial was the sign that sin was put away. His resurrection was the beginning of a new life for Himself, as Redeemer; and for us, as redeemed. This Life may now be shared.
Paul said in Gal. 1:8-9 that if anyone has a better Gospel than this, let them be accursed. Then see if the Father raises them thereby proving that the law was fulfilled and expiated before God.