Here are some of God's words in the KJV testifying to the church being the bride of Christ's.
John 3:28 Ye yourselves bear me witness, that I said, I am not the Christ, but that I am sent before him. 29 He that hath the bride is the bridegroom: but the friend of the bridegroom, which standeth and heareth him, rejoiceth greatly because of the bridegroom's voice: this my joy therefore is fulfilled. 30 He must increase, but I must decrease.
Ephesians 5:23 For the husband is the head of the wife, even as Christ is the head of the church: and he is the saviour of the body. 24 Therefore as the church is subject unto Christ, so let the wives be to their own husbands in every thing. 25 Husbands, love your wives, even as Christ also loved the church, and gave himself for it; 26 That he might sanctify and cleanse it with the washing of water by the word, 27 That he might present it to himself a glorious church, not having spot, or wrinkle, or any such thing; but that it should be holy and without blemish. 28 So ought men to love their wives as their own bodies. He that loveth his wife loveth himself. 29 For no man ever yet hated his own flesh; but nourisheth and cherisheth it, even as the Lord the church: 30 For we are members of his body, of his flesh, and of his bones. 31 For this cause shall a man leave his father and mother, and shall be joined unto his wife, and they two shall be one flesh. 32 This is a great mystery: but I speak concerning Christ and the church. 33 Nevertheless let every one of you in particular so love his wife even as himself; and the wife see that she reverence her husband.
Matthew 25:1Then shall the kingdom of heaven be likened unto ten virgins, which took their lamps, and went forth to meet the bridegroom. 2 And five of them were wise, and five were foolish. 3 They that were foolish took their lamps, and took no oil with them: 4 But the wise took oil in their vessels with their lamps. 5 While the bridegroom tarried, they all slumbered and slept. 6 And at midnight there was a cry made, Behold, the bridegroom cometh; go ye out to meet him. 7 Then all those virgins arose, and trimmed their lamps. 8 And the foolish said unto the wise, Give us of your oil; for our lamps are gone out. 9 But the wise answered, saying, Not so; lest there be not enough for us and you: but go ye rather to them that sell, and buy for yourselves. 10 And while they went to buy, the bridegroom came; and they that were ready went in with him to the marriage: and the door was shut. 11 Afterward came also the other virgins, saying, Lord, Lord, open to us. 12 But he answered and said, Verily I say unto you, I know you not. 13 Watch therefore, for ye know neither the day nor the hour wherein the Son of man cometh.
Revelation 21:9And there came unto me one of the seven angels which had the seven vials full of the seven last plagues, and talked with me, saying, Come hither, I will shew thee the bride, the Lamb's wife.
Revelation 22:17And the Spirit and the bride say, Come. And let him that heareth say, Come. And let him that is athirst come. And whosoever will, let him take the water of life freely.