Isaiah 40:4

Every valley shall be raised up, and every mountain and hill shall be brought low; and the crooked shall be made straight, and the rough places a plain.

Isaiah 45:2

I will go before thee, and make the elevated places plain; I will break in pieces the brazen doors, and cut asunder the bars of iron;

Ezekiel 21:26

thus saith the Lord Jehovah: Remove the mitre and take off the crown; what is shall be no more. Exalt that which is low, and abase that which is high.

Luke 3:5

Every gorge shall be filled up, and every mountain and hill shall be brought low, and the crooked places shall become a straight path, and the rough places smooth ways,

1 Samuel 2:8

He raiseth up the poor out of the dust; from the dung-hill he lifteth up the needy, To set him among nobles; and he maketh them inherit a throne of glory; For the pillars of the earth are Jehovah's, and he hath set the world upon them.

Job 40:11-13

Cast abroad the ragings of thine anger, and look on every one that is proud, and abase him:

Psalm 113:7-8

He raiseth up the poor out of the dust; from the dung-hill he lifteth up the needy,

Isaiah 2:12-15

For there shall be a day of Jehovah of hosts upon everything proud and lofty, and upon everything lifted up, and it shall be brought low;

Isaiah 42:11

Let the wilderness and the cities thereof lift up their voice, the villages that Kedar doth inhabit; let the inhabitants of the rock sing, let them shout from the top of the mountains:

Isaiah 42:15-16

I will lay waste mountains and hills, and dry up all their herbs; and I will make the rivers islands, and I will dry up the pools.

Ezekiel 17:24

And all the trees of the field shall know that I Jehovah have brought down the high tree, have exalted the low tree, have dried up the green tree, and made the dry tree to flourish: I Jehovah have spoken, and will do it.

Luke 1:52-53

He has put down rulers from thrones, and exalted the lowly.

Luke 18:14

I say unto you, This man went down to his house justified rather than that other. For every one who exalts himself shall be humbled, and he that humbles himself shall be exalted.

Proverbs 2:15

whose paths are crooked, and who are perverted in their course:

Treasury of Scripture Knowledge

Summary

Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked shall be made straight, and the rough places plain:

Every mountain

Bible References

Valley

Isaiah 42:11
Let the wilderness and the cities thereof lift up their voice, the villages that Kedar doth inhabit; let the inhabitants of the rock sing, let them shout from the top of the mountains:
1 Samuel 2:8
He raiseth up the poor out of the dust; from the dung-hill he lifteth up the needy, To set him among nobles; and he maketh them inherit a throne of glory; For the pillars of the earth are Jehovah's, and he hath set the world upon them.
Psalm 113:7
He raiseth up the poor out of the dust; from the dung-hill he lifteth up the needy,
Ezekiel 17:24
And all the trees of the field shall know that I Jehovah have brought down the high tree, have exalted the low tree, have dried up the green tree, and made the dry tree to flourish: I Jehovah have spoken, and will do it.
Ezekiel 21:26
thus saith the Lord Jehovah: Remove the mitre and take off the crown; what is shall be no more. Exalt that which is low, and abase that which is high.
Luke 1:52
He has put down rulers from thrones, and exalted the lowly.
Luke 3:5
Every gorge shall be filled up, and every mountain and hill shall be brought low, and the crooked places shall become a straight path, and the rough places smooth ways,
Luke 18:14
I say unto you, This man went down to his house justified rather than that other. For every one who exalts himself shall be humbled, and he that humbles himself shall be exalted.

Every mountain

Isaiah 2:12
For there shall be a day of Jehovah of hosts upon everything proud and lofty, and upon everything lifted up, and it shall be brought low;
Job 40:11
Cast abroad the ragings of thine anger, and look on every one that is proud, and abase him:

And the

Isaiah 42:16
And I will bring the blind by a way that they know not, in paths that they know not will I lead them; I will make darkness light before them, and crooked things straight. These things will I do unto them, and not forsake them.
Isaiah 45:2
I will go before thee, and make the elevated places plain; I will break in pieces the brazen doors, and cut asunder the bars of iron;
Proverbs 2:15
whose paths are crooked, and who are perverted in their course:

General references

Isaiah 2:14
and upon all the lofty mountains, and upon all the hills that are lifted up;
Isaiah 19:23
In that day shall there be a highway out of Egypt to Assyria; and the Assyrian shall come into Egypt, and the Egyptian into Assyria; and Egypt shall serve with Assyria.
Isaiah 49:11
And I will make all my mountains a way, and my highways shall be raised up.
Mark 1:3
Voice of one crying in the wilderness, Prepare the way of the Lord, make his paths straight.
Luke 1:16
And many of the sons of Israel shall he turn to the Lord their God.