Psalms 114:2

“Judah was his sanctuary, etc.] Meaning not the tribe of Judah only, though that in many things had the preeminence; the kingdom belonging to it, the chief ruler being out of it, especially the Messiah; its standard was pitched and moved first; it offered first to the service of the Lord; and the Jews have a tradition, mentioned by Jarchi and Kimchi, that this tribe, with its prince at the head of it, went into the Red sea first; the others fearing, but afterwards followed, encouraged by their example: but rather all the tribes are meant, the whole body of the people; for this is not to be understood of the tabernacle or temple in the tribe of Judah, sometimes called a sanctuary; for neither…”

“Judah was his sanctuary - His home; his abode; his sacred dwelling-place. Judah was the principal or leading tribe, recognized as the tribe where power was to be concentrated, and from which the Messiah was to proceed Genesis 49:8-12; and hence, the name was early used to denote the entire people, and ultimately, as modified in the word Jews, became the common name of the nation. And Israel his dominion - The nation that he ruled; the nation that had his law; the nation that he governed by his presence - or, of which he was the recognized king. There can be no doubt that the reference here is to God, but it is remarkable that the name “God” is not used. Perhaps the reason may be that this…”

“Judah - Or Israel, one tribe being put for all. Judah he mentions as the chief of all the tribes. Psalms 114:4”

“Exo 6:7, Exo 19:5, Exo 19:6, Exo 25:8, Exo 29:45, Exo 29:46; Lev 11:45; Deu 23:14, Deu 27:9, Deu 27:12; Eze 37:26-28; Co2 6:16, Co2 6:17; Rev 21:3 Psalms 114:3”