Our Covenant-Keeping God

Why are the Israelites called "the armies of Yahweh" here? Pastor leads his family in today's "Hopewell @Home" passage. Exodus 12:37–51 prepares us for the evening sermon on the coming Lord's Day. In these fifteen verses, the Holy Spirit teaches us that God has kept His covenant promises to multiply Abraham's seed, to bless all nations through him, and especially to be his covenant God and to take him as His covenant people.