World Wide Study Bible
a Bible passage
to provide for those who mourn in Zion—
to give them a garland instead of ashes,
the oil of gladness instead of mourning,
the mantle of praise instead of a faint spirit.
They will be called oaks of righteousness,
the planting of the Lord, to display his glory.
The Matthew Henry (Concise) commentary does not cover Isaiah 61:3.