1 Samuel 21:13

So he disguised his sanity before them, and acted insanely in their hands, and scribbled on the doors of the gate, and let his saliva run down into his beard.

Psalm 34:1-22

A Psalm of David when he feigned madness before Abimelech, who drove him away and he departed.
I will bless the Lord at all times;
His praise shall continually be in my mouth.

Proverbs 29:25

The fear of man brings a snare,
But he who trusts in the Lord will be exalted.

Ecclesiastes 7:7

For oppression makes a wise man mad,
And a bribe corrupts the heart.

Treasury of Scripture Knowledge

Summary

And he changed his behaviour before them, and feigned himself mad in their hands, and scrabbled on the doors of the gate, and let his spittle fall down upon his beard.

Bible References

Changed

Psalm 34:1
A Psalm of David when he feigned madness before Abimelech, who drove him away and he departed.
I will bless the Lord at all times;
His praise shall continually be in my mouth.
Ecclesiastes 7:7
For oppression makes a wise man mad,
And a bribe corrupts the heart.