Revelation 9:16

And the number of the armies of the horsemen was twice ten thousand times ten thousand: I heard the number of them.

Revelation 7:4

And I heard the number of them that were sealed, a hundred and forty and four thousand, sealed out of every tribe of the children of Israel:

Psalm 68:17

The chariots of God are twenty thousand, even thousands upon thousands; The Lord is among them, as in'sinai, in the sanctuary.

Ezekiel 38:4

and I will turn thee about, and put hooks into thy jaws, and I will bring thee forth, and all thine army, horses and horsemen, all of them clothed in full armor, a great company with buckler and shield, all of them handling swords;

Daniel 7:10

A fiery stream issued and came forth from before him: thousands of thousands ministered unto him, and ten thousand times ten thousand stood before him: the judgment was set, and the books were opened.

Ezekiel 23:6

who were clothed with blue, governors and rulers, all of them desirable young men, horsemen riding upon horses.

Daniel 11:40

And at the time of the end shall the king of the south contend with him; and the king of the north shall come against him like a whirlwind, with chariots, and with horsemen, and with many ships; and he shall enter into the countries, and shall overflow and pass through.

Revelation 5:11

And I saw, and I heard a voice of many angels round about the throne and the living creatures and the elders; and the number of them was ten thousand times ten thousand, and thousands of thousands;

Treasury of Scripture Knowledge

Summary

And the number of the army of the horsemen were two hundred thousand thousand: and I heard the number of them.

I heard

Bible References

The number

Psalm 68:17
The chariots of God are twenty thousand, even thousands upon thousands; The Lord is among them, as in'sinai, in the sanctuary.
Daniel 7:10
A fiery stream issued and came forth from before him: thousands of thousands ministered unto him, and ten thousand times ten thousand stood before him: the judgment was set, and the books were opened.

Horsemen

Ezekiel 23:6
who were clothed with blue, governors and rulers, all of them desirable young men, horsemen riding upon horses.
Ezekiel 38:4
and I will turn thee about, and put hooks into thy jaws, and I will bring thee forth, and all thine army, horses and horsemen, all of them clothed in full armor, a great company with buckler and shield, all of them handling swords;
Daniel 11:40
And at the time of the end shall the king of the south contend with him; and the king of the north shall come against him like a whirlwind, with chariots, and with horsemen, and with many ships; and he shall enter into the countries, and shall overflow and pass through.

I heard

Revelation 7:4
And I heard the number of them that were sealed, a hundred and forty and four thousand, sealed out of every tribe of the children of Israel:

American Standard Version Public Domain