Cross reference
Ruth 1:18
18 When she saw that she was steadfastly minded to go with her, she left off speaking to her.
Acts 21:14
14 When he would not be persuaded, we ceased, saying, "The Lord's will be done."
Acts 2:42
42 They continued steadfastly in the apostles' teaching and fellowship, in the breaking of bread, and prayer.
Ephesians 6:10
10 Finally, be strong in the Lord, and in the strength of his might.