What is the significance of being called the 'sons of Jacob'?

The term 'sons of Jacob' refers to the Israelites and symbolizes God's chosen people who are in a covenant relationship with Him. In the context of Malachi 3:6, this designation underscores the eternal commitment of God to His elect, despite their transgressions. It highlights the sovereignty of God in choosing a people for Himself, which is further explained in Ephesians 1. This concept is powerful because it demonstrates that God’s love and redemption are not dependent on human merit but are firmly rooted in His eternal and sovereign grace. Therefore, the 'sons of Jacob' reflect those who are beloved and preserved by God's unchanging and everlasting love.