NET
3 to strengthen those who mourn in Zion, by giving them a turban, instead of ashes, oil symbolizing joy, instead of mourning, a garment symbolizing praise, instead of discouragement. They will be called oaks of righteousness, trees planted by the Lord to reveal his splendor.
Darby
3 to appoint unto them that mourn in Zion, that beauty should be given unto them instead of ashes, the oil of joy instead of mourning, the garment of praise instead of the spirit of heaviness: that they might be called terebinths of righteousness, the planting of Jehovah, that he may be glorified.
KJV
3 To appoint unto them that mourn in Zion, to give unto them beauty for ashes, the oil of joy for mourning, the garment of praise for the spirit of heaviness; that they might be called trees of righteousness, the planting of the LORD, that he might be glorified.