" Praying at all times in the Spirit, with all prayer and supplication. To that end keep alert with all perseverance, making supplication for all the saints."
Ephesians 6:18
See: Notes on Ephesians by Thomas L. Constable
Publisher: Constable's Bible Study Notes
See Sermon: The Armor of God: Praying at All Times by John MacArthur
Publisher: Grace Community Church
Info from GetContent.xyz