Mark 14:34
and so He said to them, "My heart is breaking, it almost kills me! You must stay here and keep watching."
John 12:27
Now my soul is troubled; what shall I say? Father, save me from this hour of agony! And yet it was for this very purpose that I came to this hour of agony.
Mark 13:35-37
So you must keep alert, for you do not know when the master of the house is coming -- in the evening or at midnight or at daybreak or early in the morning --
Mark 14:37-38
And He went back and found them asleep, and He said to Peter, "Simon, are you asleep? Could you not watch a single hour?
Ephesians 6:18-19
Keep on praying in the Spirit, with every kind of prayer and entreaty, at every opportunity, be ever on the alert with perfect devotion and entreaty for all God's people,
1 Peter 4:7
But the end of everything on earth is near. So be serious and sober minded, that you may give yourselves to prayer.
1 Peter 5:8
Be calm and alert. Your opponent the devil is always prowling about like a roaring lion, trying to devour you.