Luke 21:36 NIV

1 Corinthians 16:13 NIV
Be on your guard; stand firm in the faith; be courageous; be strong.

1 John 2:28 NIV
And now, dear children, continue in him, so that when he appears we may be confident and unashamed before him at his coming.

1 Peter 4:7 NIV
The end of all things is near. Therefore be alert and of sober mind so that you may pray.

1 Peter 5:8 NIV
Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour.

1 Thessalonians 5:17 NIV
pray continually,

Ephesians 6:13-14 NIV
Therefore put on the full armor of God, so that when the day of evil comes, you may be able to stand your ground, and after you have done everything, to stand. Stand firm then, with the belt of truth buckled around your waist, with the breastplate of righteousness in place,

Jude 1:24 NIV
To him who is able to keep you from stumbling and to present you before his glorious presence without fault and with great joy—

Luke 12:37-40 NIV
It will be good for those servants whose master finds them watching when he comes. Truly I tell you, he will dress himself to serve, will have them recline at the table and will come and wait on them. It will be good for those servants whose master finds them ready, even if he comes in the middle of the night or toward daybreak. But understand this: If the owner of the house had known at what hour the thief was coming, he would not have let his house be broken into. You also must be ready, because the Son of Man will come at an hour when you do not expect him.”

Luke 18:1 NIV
Then Jesus told his disciples a parable to show them that they should always pray and not give up.

Mark 13:33 NIV
Be on guard! Be alert ! You do not know when that time will come.