When did the law of one wife come into practice David Abraham and many old testament men had more than one wife?

The law of one wife, or monogamy, became more formally established in Jewish law with the teachings found in the later texts of the Old Testament and rabbinic interpretations. While figures like David and Abraham had multiple wives, these practices were more reflective of cultural norms at the time rather than divine mandate. By the time of the New Testament and early Christianity, monogamy was increasingly emphasized. The shift towards monogamous relationships aligns with evolving social and religious values over time.