thou shouldest: Deuteronomy 5:2-3; Exodus 19:5-6; Joshua 24:25; 2 Kings 11:17; 2 Chronicles 15:12-15
enter: Heb. pass, This is an allusion to the solemn ceremony used by several ancient nations, when they entered into a covenant with each other. The victims, slain as a sacrifice on this occasion, were divided, and and parts laid asunder. The contracting parties then passed between them, imprecating, as a curse on those who violated the sacred compact, that they might in like manner be cut asunder (Genesis 15:10). St. Cyril, in his work against Julian, shows that passing between the divided parts of a victim was used also among the Chaldeans and other people.
into his oath: Deuteronomy 29:14; 2 Chronicles 15:12-15; Nehemiah 10:28-29