Mountains and Hills
The mountains and hills are called to witness the Lord's case against Israel, symbolizing the enduring and unchanging nature of God's creation as a witness to His covenant with His people.
This imagery emphasizes God's sovereignty and the permanence of His covenant, as the natural world stands as a testament to His enduring promises and the people's obligations.
In ancient Near Eastern cultures, covenants were often witnessed by elements of creation, underscoring their solemnity and binding nature.