Persevere

(1 Tim 4:16 NIV) Watch your life and doctrine closely. Persevere in them, because if you do, you will save both yourself and your hearers.

(Heb 10:36 NIV) You need to persevere so that when you have done the will of God, you will receive what he has promised.

Perseverance

Ephesians 6

18 Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;