NET

3 For God achieved what the law could not do because it was weakened through the flesh. By sending his own Son in the likeness of sinful flesh and concerning sin, he condemned sin in the flesh,

Darby

3 For what the law could not do, in that it was weak through the flesh, God, having sent his own Son, in likeness of flesh of sin^D8076, and for sin, has condemned sin in the flesh,

Darby Bible Notes

sin - i.e. as a sacrifice for sin. The same expression as in Heb. 10.6,18,26; 13.11. Used frequently in LXX in Leviticus for a 'sin-offering,' as Lev. 5.11; 7.37; 16.5; Num. 8.8.

KJV

3 For what the law could not do, in that it was weak through the flesh, God sending his own Son in the likeness of sinful flesh, and for sin^K6833, condemned sin in the flesh:

KJV Bible Notes

for sin: Or, by a sacrifice for sin.