how

Proverbs 1:22
"How long, O simple ones, will you love simplicity? How long will scoffers delight in their scorn and fools hate knowledge?

Proverbs 24:33, 34
A little sleep, a little slumber, a little folding of the hands to rest, . . .

Jeremiah 4:14
Wash the evil from your heart, O Jerusalem, so that you may be saved. How long will you harbor wicked thoughts within you?

when

Psalm 94:8
Take notice, O senseless among the people! O fools, when will you be wise?

John 1:6
There came a man who was sent from God. His name was John.

Romans 13:11
And do this, understanding the occasion. The hour has come for you to wake up from your slumber, for our salvation is nearer now than when we first believed.

Ephesians 5:14
So it is said: "Wake up, O sleeper, rise up from the dead, and Christ will shine on you."

1 Thessalonians 5:2-7
For you are fully aware that the day of the Lord will come like a thief in the night. . . .