The word Beulah is only mentioned in the Bible once in Isaiah 62:4.  In context, Isaiah 62 is a prophecy about Israel and a future time when Israel will be restored to a position of honor in God’s sight and for the nations to see. 

Isaiah 62:4 (Amplified) You [Judah] shall no more be termed Forsaken, nor shall your land be called Desolate any more. But you shall be called Hephzibah [My delight is in her], and your land be called Beulah [married]; for the Lord delights in you, and your land shall be married [owned and protected by the Lord].”

Isaiah begins the verse by prophesying that Israel will be “forsaken” and “desolate”.  We know this happened at the time of Jesus’ first advent when the nation of Israel (in general) rejected Jesus as their Messiah.  Jesus came initially to Israel, not the Gentiles. Matthew 10:5-6, Jesus told the 12 disciples the following…

“These twelve [disciples] Jesus sent forth, and commanded them, saying, Go not into the way of the Gentiles, and into any city of the Samaritans enter ye not: But go rather to the lost sheep of the house of Israel.”

God loved Israel and had made a promise to Abraham, Isaac, and Jacob. Genesis 28:14, “…in thee and in thy seed shall all the families of the earth be blessed.”

Amos 3:2, “You [Israel] only have I known of all the families of the earth: therefore I will punish you for all your iniquities.”

The prophets of Israel were continuously reminding Israel to come back to God.  Jesus and the disciples were also witnessing to Israel, trying to have them see how far off track they have gone from their original covenant relationship to God.   However, as we know, Israel rejected Jesus and had him crucified. Jesus verbally rejected the nation when he said, O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not!  Behold, your house is left unto you desolate”. Matthew 23:37-38

Back to the Isaiah 62:4 scripture, we need to remember Isaiah is prophesying also about a time of great joy when Israel will no longer be “forsaken” or “desolate”. 

Isaiah 62:4 (Amplified), “You [Judah] shall no more be termed Forsaken, nor shall your land be called Desolate any more. But you shall be called Hephzibah [My delight is in her], and your land be called Beulah [married]; for the Lord delights in you, and your land shall be married [owned and protected by the Lord].”

God never breaks His promises in spite of all our failings.  God will keep his promise to Israel:   “…in thee and in thy seed shall all the families of the earth be blessed.”  We have slowly started to see favor returning to Israel, with Israel becoming a nation again in 1948.  Israel’s swap lands have been transformed to some of the most bountiful farmlands, and scientific and technological advances continue to come out of Israel every day.  However, as a nation, Israel still has not fully turned to God.  So the remainder of the prophecy is still in the future.

Jeremiah 31:31, Hebrews 8:8 Behold, the days come, saith the Lord, that I will make a new covenant with the house of Israel, and with the house of Judah:

Israel will need to fully turn back to God out of their own free will, but we can be assured that it will happen, because the scriptures confirm that for us.  And at that time God will call Israel His delight, God will make a new covenant with Israel, God will restore Jerusalem and make a new marriage contract with Israel, and God will call Israel his own once again and protect them.