Then I looked, and behold, on Mount Zion stood the Lamb, and with him 144,000 who had his name and his Father’s name written on their foreheads.
The phrase “Then I looked, and behold, on Mount Zion stood the Lamb” refers to Jesus as King of kings as seen in Psalms 2:6 which says, “As for me, I have set my King on Zion, my holy hill.”
He will reign on earth at His second coming for 1000 years in Jerusalem.
For commentary on the 144,000, please click on the link: Revelation (7:1-8)
2 And I heard a voice from heaven like the roar of many waters and like the sound of loud thunder. The voice I heard was like the sound of harpists playing on their harps
The sound of their voices was heard as one being in harmony with each other. It sounded like a musical instrument that was very beautiful and powerful, resembling the power of God.
3 and they were singing a new song before the throne and before the four living creatures and before the elders. No one could learn that song except the 144,000 who had been redeemed from the earth.
The 144,000 were rewarded for their faithfulness to the Lord with a new song that only they knew to sing praises before the throne of God and those in it. The song expressed love for their Redeemer.
For commentary on the four living creatures, please click on the link: Revelation (4:6-10)
For commentary on the elders, please click on the link: Revelation (4:1-5)
4 It is these who have not defiled themselves with women, for they are virgins. It is these who follow the Lamb wherever he goes. These have been redeemed from mankind as firstfruits for God and the Lamb
“not defiled themselves with women, for they are virgins” refers to their dedication to Jesus Christ. Read below
1 Corinthians 7:32-35, 32 I want you to be free from anxieties. The unmarried man is anxious about the things of the Lord, how to please the Lord. 33 But the married man is anxious about worldly things, how to please his wife, 34 and his interests are divided. And the unmarried or betrothed woman is anxious about the things of the Lord, how to be holy in body and spirit. But the married woman is anxious about worldly things, how to please her husband. 35 I say this for your own benefit, not to lay any restraint upon you, but to promote good order and to secure your undivided devotion to the Lord.
The phrase “It is these who follow the Lamb wherever he goes.” Shows their steadfast love and obedience to the Lord Jesus Christ and the Gospel.
They were the firstfruits of Israel, the best of the land (people) which show their unique character and commitment to Christ.
5 and in their mouth no lie was found, for they are blameless.
That which came out of their mouth was the Gospel. They lived what they preached.