In what you posted I must have just missed the word COVENANT. Would you point that out for me?
Maybe you should revisit the crystal clear language of the OLD COVENANT, that was based on OBEDIENCE. It was CONDITIONAL. Israel, as a nation, is finished. They were given a FINAL 490 years of probation according to Daniel 9. AGAIN, here is my proof (see video below). All texts are incorporated. There is no more Jewish Nation (except in the fantasies of the followers of John Darby). There is now ONLY those in Christ Jesus. Every INDIVIDUAL Jew has the same chance at salvation as everyone else. God is no respecter of persons. Never has been, never will.
I would use the word promises.
But marriage is certainly a covenant, and marriage is certainly mentioned in Isaiah 62.
2 Enlarge the place of thy tents, and let them spread out the curtains of thine habitations: spare not: stretch out thy cords, and make fast thy stakes.
3 For thou shalt increase on the right hand and on the left, and thy seed shall possess the Gentiles, and dwell in the desolate cities.
4 Fear not: for thou shalt not be ashamed, neither shalt thou be confounded: for thou shalt not be put to shame: yea, thou shalt forget the shame of thy youth, and shalt not remember the reproach of thy widowhood anymore.
5 For he that made thee, is thine husband, (whose name is the Lord of hosts) and thy redeemer the holy One of Israel, shall be called the God of the whole world.
6 For the Lord hath called thee, being as a woman forsaken, and afflicted in spirit, and as a young wife when thou wast refused, saith thy God.
7 For a little while have I forsaken thee, but with great compassion will I gather thee.
8 For a moment in mine anger, I hid my face from thee for a little season, but with everlasting mercy have I had compassion on thee, saith the Lord thy redeemer.
9 For this is unto me as the waters of Noah; for as I have sworn that the waters of Noah should no more go over the earth, so have I sworn that I would not be angry with thee, nor rebuke thee.
10 For the mountains shall remove, and the hills shall fall down; but my mercy shall not depart from thee, neither shall the covenant of my peace fall away, saith the Lord, that hath compassion on thee.
11 O thou afflicted and tossed with tempest, that hast no comfort, behold, I will lay thy stones with the carbuncle, and lay thy foundation with sapphires,
12 And I will make thy windows of emeralds, and thy gates shining stones, and all thy borders of pleasant stones.
13 And all thy children shall be taught of the Lord, and much peace shall be to thy children.
14 In righteousness shalt thou be established, and be far from oppression; for thou shalt not fear it: and from fear; for it shall not come near thee.
15 Behold, the enemies shall gather himself, but without me: whosoever shall gather himself in thee, against thee, shall fall.
16 Behold, I have created the smith that bloweth the coals in the fire, and him that bringeth forth an instrument for his work, and I have created the destroyer to destroy.
17 But all the weapons that are made against thee, shall not prosper: and every tongue that shall rise against thee in judgment, thou shalt condemn. This is the heritage of the Lord's servants, and their righteousness is of me, saith the Lord.