Exodus 19, at Mount Sinai.
Mount Sinai: Notice the abrupt rise from the plain. You know when you touch the mountain.
The New International Version translation mentions in Revelation 1:5b-6
To him who loves us and has freed us from our sins by his blood, 6 and has made us to be a kingdom and priests to serve his God and Father—to him be glory and power for ever and ever! Amen.
King James Version translates the same passage:
Unto him that loved us, and washed us from our sins in his own blood,
6 And hath made us kings and priests unto God and his Father; to him be glory and dominion for ever and ever. Amen.
The NIV is correct, the Greek is βασιλείαν which means a kingdom.
When the Apostle Paul wrote Galatians Arabia Petraea was part of the Roman Empire. This is the Arabia he refers to
Elam is another word for ancient Persia, the fall of Babylon is described in https://lenbilen.com/2017/09/24/daniel-5-the-handwriting-on-the-wall/
Tema: The name of a son of Ishmael (Gen 25:15; 1 Ch 1:30) , also an oasis half-way between Edom and Medina in what is now the Levant part of Saudi Arabia.
Kedar, meaning dark-skinned was the second son of Ishmael (Genesis 25:13) . It was also the name for the nomadic tribes of Arabs, the Bedouins generally (Isa. 21:16; 42:11; 60:7; Jer. 2:10; Ezek. 27:21), who dwelt in the northwest of Arabia. They lived in black hair-tents (Song of Songs 1:5). To “dwell in the tents of Kedar” was to be cut off from the worship of the true God (Psalms 120:5). The Kedarites suffered at the hands of Nebuchadnezzar (Jer. 49:28-29).