NT-EPISTLES.filter - kjv fervently:

kjv@Colossians:4:12 @ Epaphras, who is one of you, a servant of Christ, saluteth you, always labouring fervently for you in prayers, that ye may stand perfect and complete in all the will of God.

kjv@1Peter:1:22 @ Seeing ye have purified your souls in obeying the truth through the Spirit unto unfeigned love of the brethren, see that ye love one another with a pure heart fervently: