Isaiah 40:4 - Every valley shall be exalted, and every mountain and hill shall be made low: and the crooked H6121 shall be made straight, and the rough places plain:
Jeremiah 17:9 - The heart is deceitful H6121 above all things, and desperately wicked: who can know it?
Hosea 6:8 - Gilead is a city of them that work iniquity, and is polluted H6121 with blood.