The Church of God claims that the Bible's words in Isaiah 25 are a prophecy of the Passover that will be observed by their church at the end of the world, but this is a misinterpretation.

[Isaiah 25 :6~8] And in this mountain shall the LORD of hosts make unto all people a feast of fat things, a feast of wines on the lees, of fat things full of marrow, of wines on the lees well refined. And he will destroy in this mountain the face of the covering cast over all people, and the vail that is spread over all nations. He will swallow up death in victory; and the Lord GOD will wipe away tears from off all faces; and the rebuke of his people shall he take away from off all the earth: for the LORD hath spoken it.

This is a prophecy that continues from the preceding 24 chapters, and it concerns the end of the world. That God will wash away the shame that his people have suffered and the tears that they have shed, and that he will destroy death forever, is a prophecy that will be fulfilled in the last days. He also says that he will make a feast of clear wine that he has stored for a long time, and the Church of God quotes the passage about making a feast of wine and claims that it is prophesying about the Passover that they observe. But this is not true. Paul's testimony to Isaiah 25 was as follows.

[1 Corinthians 15:50~24] Now this I say, brethren, that flesh and blood cannot inherit the kingdom of God; neither doth corruption inherit incorruption. Behold, I shew you a mystery; We shall not all sleep, but we shall all be changed, In a moment, in the twinkling of an eye, at the last trump: for the trumpet shall sound, and the dead shall be raised incorruptible, and we shall be changed. For this corruptible must put on incorruption, and this mortal must put on immortality. So when this corruptible shall have put on incorruption, and this mortal shall have put on immortality, then shall be brought to pass the saying that is written, Death is swallowed up in victory.

When Paul testified to the resurrection of the dead, he quoted a passage of Scripture from Isaiah 25 where it is written that death will be swallowed up in victory. Therefore, Isaiah 25 was not prophesying a scene of Passover observance, but of the final resurrection. John testified to the same in Revelation 21.

[Revelation 21:1~4] And I saw a new heaven and a new earth: for the first heaven and the first earth were passed away; and there was no more sea. ...(4) And God shall wipe away all tears from their eyes; and there shall be no more death, neither sorrow, nor crying, neither shall there be any more pain: for the former things are passed away.

In the new heavens and new earth, God is said to wipe away tears from the eyes of all people and destroy death, which is the same prophecy as Isaiah 25. But when will this happen? In the previous chapter, Revelation 20, we see that it is fulfilled when the resurrection of the dead takes place.

[Revelation 20:6 ]Blessed and holy is he that hath part in the first resurrection: on such the second death hath no power, but they shall be priests of God and of Christ, and shall reign with him a thousand years.

Therefore, the day of destroying death forever written in Isaiah 25 did not prophesy the Passover celebrated by the Church of God, but rather the end time when the resurrection of the dead takes place.