And in that day - (see Isaiah 12:1).

Call upon his name - Margin, 'Proclaim.' It denotes to call upon him in the way of celebrating his praise. The whole hymn is one of praise, and not of prayer.

Declare among the people - Among all people, that they may be brought to see his glory, and join in the celebration of his praise.

His doings - Particularly in regard to the great events which are the subject of the previous predictions - his interposition in saving people by the Messiah from eternal death.

Make mention - Hebrew, 'Cause it to be remembered' (see the note at Isaiah 62:6).

That his name is exalted - That it is worthy of adoration and praise. It is worthy to be exalted, or lifted up in view of the nations of the earth 2 Samuel 22:47; Psalm 21:13; Psalm 46:10.

Call upon his name - קראו בשמו kiru bishmo, invoke his name. Make him your Mediator, or call the people in his name. Preach him who is the Root of Jesse, and who stands as an ensign for the nations. Call on the people to believe in him; as in him alone salvation is to be found.

In that day shall ye say, praise the Lord,.... On account of his being and perfections, for blessings received from him, especially spiritual ones; and particularly such as are before mentioned, fulness of grace in him, strength and salvation by him, a view of interest in him as a Saviour, and divine comforts communicated from him; which is done by giving him the glory of them, and thanks for them. This is a work very proper for Gospel times; it always was a duty, and there was ever reason for it under the former dispensation, and much more under the present one; and there will be still more reason for it in the latter day here referred to, when antichrist will be destroyed, the kingdom of Christ will be enlarged, and his church will be in a very glorious state and condition, her walls will be salvation, and her gates praise; when the saints will be stirring up one another to this service, and engaging in it with all readiness and cheerfulness; see Revelation 11:15,

call upon his name: which takes in the whole of religions worship, of which Christ is the object, being the true Jehovah; and particularly prayer, in which his name is invoked together with faith in him, and expressions of affection to his name; which is precious to believers, and is as ointment poured out:

declare his doings among the people; not merely his works of creation, in which he was equally concerned with his divine Father; nor so much his miracles which he wrought when on earth, in proof of his deity and Messiahship, and in confirmation of his doctrine; but his acts of obedience and righteousness, which were perfect; and his bearing the sins of his people, and the punishment due to them; and so fulfilled the whole law, and hereby accomplished the great work of redemption and salvation; which, according to his orders, have been published among the Gentiles, for their good, and his glory:

make mention that his name is exalted; that is, he himself, who has a name given him above every name; for having obeyed, suffered, and died in the room of his people, he is by his Father, according to promise, exalted, by raising him from the dead, receiving him into heaven, placing him at his right hand, giving him all power in heaven and in earth, and causing angels, authorities, principalities, and powers, to be subject to him; all which is to be made mention of, to the honour of his name: or else the sense is, to speak of him, to make mention of his name, of his person, of his offices, of his grace and salvation, that he may be exalted in each of them by his people; for he is, and ought to be, exalted in their hearts, and with their lips, since he is above all in the excellency of his person, and is their only Saviour and Redeemer, Head and Husband; and so he will be exalted more abundantly in the latter day. See Gill on Isaiah 2:11.

And in that day shall ye say, Praise the LORD, call upon his name, declare his doings among the people, make mention that his name is exalted.

call...: or, proclaim

4. make mention-Hebrew, "cause it to be remembered."

12:10-16 When the gospel should be publicly preached, the Gentiles would seek Christ Jesus as their Lord and Saviour, and find rest of soul. When God's time is come for the deliverance of his people, mountains of opposition shall become plains before him. God can soon turn gloomy days into glorious ones. And while we expect the Lord to gather his ancient people, and bring them home to his church, also to bring in the fulness of the Gentiles, when all will be united in holy love, let us tread the highway of holiness he has made for his redeemed. Let us wait for the mercy of our Lord Jesus Christ unto eternal life, looking to him to prepare our way through death, that river which separates this world from the eternal world.