The Hebrew word translated as “faithless” literally means to act treacherously, deceitfully, faithlessly. In this instance, the reference is to disobedience to the demands of the covenant which God had established with Abraham, Isaac, and Jacob, and renewed at Mount Sinai with Israel. Within the framework of the covenant were laws that described the Israelites’ duty towards God, as well as laws that delineated the Israelites’ duties towards each other. In this instance, the covenant breaking refers more to the latter, as is clear from the reference to being “faithless to one another.” However, unfaithfulness to “one another” is also unfaithfulness to God, who established this covenant that dictated how his people were to conduct themselves with one another.