G5428–φρόνησις–phronēsis

and he will be His forerunner in the spirit and power of Elijah, to turn fathers' hearts to the children, and cause the rebellious to walk in the wisdom of the upright, to make a people perfectly ready for the lord."

φρονήσει phronēsei “[the] wisdom”

the grace which He, the possessor of all wisdom and understanding, lavished upon us,

φρονήσει phronēsei “in understanding”