When the Pharisees failed to entrap Jesus in His speech, the Sadducees tried in their own way. They did not believe in the resurrection, and yet they came with a hypothetical question regarding the resurrection. In their scenario, a woman who marries seven brothers in quick succession after their untimely deaths dies herself and is then resurrected with all of her husbands. They asked, "Which husband would she belong to in the resurrection?"
Jesus answered by informing them that they erred, not knowing the Scriptures nor the power of God. Can you imagine how insulting that was to these learned men of the Law? They probably smarted at being put in their place by such words, but Jesus was correct in His assessment. As He explained, in this new kingdom, people would not be given in marriage as in their earthly lives. Women would not be subject to their husbands with very little rights and privileges as was the practice in the Levitical/Mosaic system. As a new creation in Christ, all born again children of God become a new man in Christ without regard to gender, ethnicity, or religious background. Like the angels, new creations in Christ are only subject to God.
Jesus also challenged their beliefs regarding the resurrection, explaining that God is the God of Abraham, Issac, and Jacob, the God of the living and not the dead. God had always referred to Abraham as being alive and not dead, even though his soul had left his earthly body long ago. Death was and always has been an enemy of God. God has always spoken of and embraced the preciousness of life.
The multitudes marveled at Jesus' teaching while the Sadducees were silenced into submission.