Psalms 50:14 Offer unto God thanksgiving; and pay thy vows unto the most High:

Matthew 26:41 Watch and pray, that ye enter not into temptation: the spirit indeed is willing, but the flesh is weak.

Ephesians 6:18 Praying always with all prayer and supplication in the Spirit, and watching thereunto with all perseverance and supplication for all saints;

Luke 18:1 And he spake a parable unto them to this end, that men ought always to pray, and not to faint;

1 Peter 5:8 Be sober, be vigilant; because your adversary the devil, as a roaring lion, walketh about, seeking whom he may devour: