perfecting
3 occurrences across the corpus
King James Version
2 Corinthians 7:1
Having therefore these promises, dearly beloved, let us cleanse ourselves from all filthiness of the flesh and spirit, perfecting holiness in the fear of God.
Ephesians 4:12
For the perfecting of the saints, for the work of the ministry, for the edifying of the body of Christ:
OT Pseudepigrapha
The Letter of Aristeas 6:26
All these ordinances were made for the sake of righteousness to aid the quest for virtue and the perfecting of character.