Hebrews 2:17
So, for this reason, He had to become like His brothers in every way [i.e., except that He never sinned], so that He could become a merciful and faithful Head Priest in things related to God's [service], [and] that He could provide a means of purifying [Lev. 16:30] for people's sins [i.e., make atonement for them].
Hebrews 5:3
And because of this he is obligated to offer [sacrifices] for his own sins also, as well as the people's sins.
2 Corinthians 5:21
God considered Christ to be sinful on our behalf, even though He never sinned, so that we could be considered right with God through Him.
Titus 2:14
He gave Himself up for us, to buy us back from [enslavement to] all [kinds of] wickedness and to purify for Himself a group of people who belong to Him and who are eager to do good deeds.