שמואל א כא:יד פירוש: רש״י

His behavior. His words.

And feigned madness. He acted insane.¹¹The Midrash relates that Dovid said to ה׳ that he understood all creation of ה׳ with the exception of madness, for which he saw no purpose. ה׳ then responded that He will demonstrate to him the value of madness and that Dovid will need it.¹²I.e., he wrote in a normal handwriting, irrational statements.

He scribbled. He wrote.¹³He wrote, ‘Ochish the King of Gas owes me one hundred thousand gold coins and his wife owes me fifty.’