'Steadfastly' in the Bible

While they were looking steadfastly into the sky as he went, behold, two men stood by them in white clothing,

All these with one mind and one purpose were continually devoting themselves to prayer, [waiting together] along with the women, and Mary the mother of Jesus, and with His brothers.

They were continually and faithfully devoting themselves to the instruction of the apostles, and to fellowship, to eating meals together and to prayers.

Day by day, continuing steadfastly with one accord in the temple, and breaking bread at home, they took their food with gladness and singleness of heart,

But we will [continue to] devote ourselves [steadfastly] to prayer and to the ministry of the word.”

But he, being full of the Holy Spirit, looked up steadfastly into heaven, and saw the glory of God, and Jesus standing on the right hand of God,

Paul, looking steadfastly at the council, said, "Brothers, I have lived before God in all good conscience until this day."