She sent out her boughs unto the sea, and her branches unto the river.
She sent out her boughs unto the sea, and her branches unto the river. "The sea" is the Mediterranean, the western boundary of the Holy Land; "the river" is the Euphrates, the eastern boundary. The Psalmist has in view the original promise to Jacob (Genesis 28:14). (Compare Deuteronomy 11:24, "Every place whereon the soles of your feet shall tread shall be yours, from the wilderness and Lebanon, from the river, the river Euphrates, even unto the uttermost sea shall your coast be;" also Joshua 1:4.