The oath which I have sworn (so Deuteronomy 7:8; comp. Deuteronomy 8:18). As it is this day; a Deuteronomic formula (see e.g. Deuteronomy 2:30; Deuteronomy 4:20), appealing to the test of experience.
So be it, O Lord. The-Hebrew has "Amen, Jehovah." "Amen" equivalent to "true, faithful, trustworthy;" or used in this way as a formula of asseveration, "may it be verified by facts"; comp. Jeremiah 28:6.