Jeremiah 2:3

In those days Israel was set apart to the Lord in a way that she had not been since she entered the land and began to worship idols (cf. Exodus 19:6; Exodus 22:31). She was His firstfruits among the nations that He would bless (cf. Genesis 12:1-3; Leviticus 23:10; Leviticus 23:17; Deuteronomy 26:1-11). The Lord punished peoples who tried to devour the Israelites then (e.g., the Egyptians and the Amalekites), just as He punished those who ate His firstfruits offerings without divine authorization (Leviticus 22:10; Leviticus 22:16).