No scripture citation is given, and we have not found any scripture that says the above. This may appear in some translation, but so far, we have not found it, so we are left to guess as to what scripture, if any, is being referred to.
Evidently, this is presented with the assumption that if Jehovah "has come", that it must be referring to Jesus who came to earth. In other words, it is being imagined, assumed, added to and read into what is written that Jesus is Jehovah (Yahweh), since it was Jesus who came to the earth. The fact is that it was Jehovah, whom Jesus is depicted as referring to as "our God", who sent Jesus to the earth. -- Isaiah 61:1,2; Galatians 4:4; 1 John 4:9.
Nevertheless, Jehovah (Yahweh) came to deliver His people, the children of Israel from bondage in Egypt. (Exodus 3:8) He did this through Moses and Aaron. --- Exodus 3:10; Numbers 33:1; Psalm 77:20; Acts 7:35,36.
Jehovah (Yahweh) later came to examine and bless His people. -- Exodus 20:20,24.
The time is yet future when Jehovah (Yahweh) comes to judge the world. (Psalm 96:13; 98:9) Jehovah is depicted as only one person in Acts 17:22-30. Acts 17:31 reveals that Jehovah comes to judge by means of one who is not Himself, but the one whom He has appointed to judge. John 5:22,27,29,30 reveals that Jesus is the one who acts as Jehovah's agent in judging.
The person further stated: "Let the whole earth rejoice in our God and Redeemer." Again, no scripture citation is given, and we have not been able to ascertain what scripture (if any) is being referred to. The nearest we could find is:
Psalms 96:11 - Let the heavens be glad, and let the earth rejoice; Let the sea roar, and the fulness thereof;
Psalms 96:12 - Let the field exult, and all that is therein; Then shall all the trees of the wood sing for joy
Psalms 96:13 - Before Jehovah; for he cometh, For he cometh to judge the earth: He will judge the world with righteousness, And the peoples with his truth. -- American Standard Version.
The earth today still is under the blinding deceptions of Satan. (2 Corinthians 4:3,4; Revelations 12:9; Romans 8:20) The world is still under the subjection to sun of vanity (Ecclesiastes 1:2,13,14; 2:11), groaning under its bondage of corruption (Romans 8:21,22). Today, only through Christ can one become a son of God who is not under this bondage. (Romans 8:14,15) These can rejoice in hope (Romans 5:2), but even with this rejoicing there is still a groaning, as these sons of God while in this age still need to be delivered from their present body which is yet to be dissolved. -- Romans 8:23-25; 2 Corinthians 5:1.
When God comes to judge the world by means of his Son, however, the veil now over the nations will be destroyed (Isaiah 26:7; 2 Corinthians 4:3,4; Revelation 20:3), and all nations will be able to learn the righteous ways of Jehovah and rejoice in the healing of that time. -- Isaiah 2:2-4; 11:9; 26:9; Revelation 22:2.
Nothing, however, in any of this calls for us to imagine, assume, add to, and read into the scriptures that Jesus is Jehovah, especially since Jehovah is shown to be the God of the Messiah. -- Micah 5:4; Ephesians 1:3.