Isaiah 45:1,isaiah 45:2

Isaiah 40:4 NIV
Every valley shall be raised up, every mountain and hill made low; the rough ground shall become level, the rugged places a plain.

Isaiah 42:16 NIV
I will lead the blind by ways they have not known, along unfamiliar paths I will guide them; I will turn the darkness into light before them and make the rough places smooth. These are the things I will do; I will not forsake them.

Luke 3:5 NIV
Every valley shall be filled in, every mountain and hill made low. The crooked roads shall become straight, the rough ways smooth.

Psalm 107:16 NIV
for he breaks down gates of bronze and cuts through bars of iron.