|Easton's Bible Dictionary|
Married, is used in Isaiah 62:4 metaphorically as the name of Judea: "Thy land shall be married," i.e., favoured and blessed of the Lord.
Int. Standard Bible Encyclopedia
bu'-la (be`ulah "married"): A name symbolically applied to Israel: "Thy land (shall be called) Beulah. thy land shall be married.. so shall thy sons marry thee" (Isaiah 62:4 f). In this figure, frequently used since Hosea, the prophet wishes to express the future prosperity of Israel. The land once desolate shall again be populated.
Beulah (1 Occurrence)
Isaiah 62:4 You shall no more be termed Forsaken; neither shall your land any more be termed Desolate: but you shall be called Hephzibah, and your land Beulah; for Yahweh delights in you, and your land shall be married. (WEB KJV ASV WBS NIV)