1 And in that day thou shalt say, O Lord, I will praise thee: though thou wast angry with me, thine anger is turned away, and thou comfortedst me.

2 Behold, God is my salvation; I will trust, and not be afraid: for the Lord Jehovah is my strength and my song; he also is become my salvation.

3 Therefore with joy shall ye draw water out of the wells of salvation.

4 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.

5 Sing unto the Lord; for he hath done excellent things: this is known in all the earth.

6 Cry out and shout, thou inhabitant of Zion: for great is the Holy One of Israel in the midst of thee.

Commentary

Verse 1

John Wesley's Bible Commentary
In that day - When this great work of the reduction of Israel, and conversion of the Gentiles is fulfilled.
McArther Bible Commentary
These are two brief songs of praise (Isa 12:1-3, Isa 12:4-6) which redeemed Israel will sing at the beginning of the millennial kingdom. They are the earthly counterpart to the heavenly doxology in Rev 19:6-7.
Bible Cross References
Job 13:16 Psalm 9:1 Psalm 30:5 Psalm 71:21 Isaiah 25:1 Isaiah 26:1 Isaiah 40:1 Isaiah 40:2 Isaiah 54:7 Isaiah 54:9 Isaiah 61:10 Isaiah 64:5 Isaiah 65:18 Isaiah 66:13 Jeremiah 30:19 Hosea 14:4 Zechariah 8:11 Zechariah 8:19

Verse 2

John Wesley's Bible Commentary
God - My salvation hath not been brought to pass by man, but by the almighty power of God.
McArther Bible Commentary
God is my salvation. God will deliver the faithful of Israel from both their political opponents and the spiritual consequences of their sins. Yah, the Lord. Rendered "the Lord JEHOVAH" in the original KJV, the doubling of the personal name of God serves to emphasize His role as the covenant-keeping One. my strength and song … my salvation. Moses and the Israelites sang a similar song to celebrate their deliverance from the Egyptians (Exo 15:2; cf. Psa 118:14).
Bible Cross References
Exodus 15:2 1 Samuel 2:1 Job 13:16 Psalm 112:8 Psalm 118:14 Isaiah 10:24 Isaiah 17:10 Isaiah 26:3 Isaiah 26:4 Isaiah 27:5 Isaiah 32:2 Isaiah 45:17 Isaiah 49:5 Isaiah 50:10 Isaiah 61:10 Isaiah 62:11 Isaiah 65:18 Daniel 3:28 Joel 2:23 Habakkuk 3:18

Verse 3

John Wesley's Bible Commentary
With joy - Your thirsty souls shall be filled with Divine graces and comforts, which you may draw from God, in the use of gospel - ordinances.
McArther Bible Commentary
water … wells. Isaiah's readers doubtless thought of how God satisfied the physical thirst of their ancestors in the Wilderness of Sin (Exo 17:1-7). The same provision will apply for their descendants when the Messiah comes to deliver the nation (Isa 41:17-18; cf. Isa 30:25; Isa 35:6-7; Isa 43:19; Psa 107:35). The NT amplifies this provision to include the supply of spiritual water for the thirsty soul (Joh 4:10, Joh 4:14; Joh 7:37; Rev 7:16-17; Rev 21:6; Rev 22:17).
Bible Cross References
John 4:10 John 7:37 John 7:38 1 Samuel 2:1 Isaiah 41:18 Jeremiah 2:13 Ezekiel 47:9

Verse 4

McArther Bible Commentary
among the peoples … in all the earth. Following the future Day of the Lord, Israel will testify to the rest of the world about His greatness and majesty. This was His purpose for His earthly people from the beginning.
Bible Cross References
Psalm 105:1 Psalm 145:4 Psalm 148:13 Isaiah 24:15 Isaiah 26:8 Isaiah 42:12 Isaiah 48:20 Malachi 1:11

Verse 5

Bible Cross References
Exodus 15:1 Psalm 98:1 Isaiah 24:14 Isaiah 42:10 Isaiah 42:11 Isaiah 44:23 Malachi 1:11

Verse 6

McArther Bible Commentary
O inhabitant of Zion. The Hebrew of this verse personifies Zion as a woman by commanding her to "cry out and shout" in celebration of the Lord's greatness.
Bible Cross References
Psalm 46:5 Psalm 99:2 Isaiah 1:24 Isaiah 24:14 Isaiah 49:26 Isaiah 52:9 Isaiah 54:1 Isaiah 60:16 Jeremiah 10:6 Ezekiel 35:10 Ezekiel 39:7 Ezekiel 48:8 Ezekiel 48:35 Hosea 11:9 Zephaniah 3:14 Zephaniah 3:15 Zechariah 2:5 Zechariah 2:10