Rev 12:6
And the woman fled into the wilderness, where she hath a place prepared of God, that they should feed her there a thousand two hundred and threescore days.
this woman is in the earth, she is the Bride of Christ, protected by the Lord for the last 3.5 years of trib.
Rev 15:2
And I saw as it were a sea of glass mingled with fire: and them that had gotten the victory over the beast, and over his image, and over his mark, and over the number of his name, stand on the sea of glass, having the harps of God.
these have overcome, and will become one with the Lord at the Marriage Supper of the Lamb.
there will be guests at the marriage, so not all will be the bride. There are two companies of overcomers. The overcomers that were waiting for the revealing of the Messiah will sing the song of Moses the servant of God, those the look back to the revealing of Messiah will be singing the song of the Lamb. verse 3