I Samuel 21:12

But David took these words to heart, and was in great fear of Achish, lest he should treat him as an enemy, and kill him. In order to escape this danger, "he disguised his understanding (i.e., pretended to be out of his mind) in their eyes (i.e., before the courtiers of Achish), behaved insanely under their hands (when they tried to hold him as a madman), scribbled upon the door-wings, and let his spittle run down into his beard." The suffix to וישׁנּו is apparently superfluous, as the object, את־טעמו, follows immediately afterwards. But it may be accounted for from the circumstantiality of the conversation of every-day life, as in Sa2 14:6, and (though these cases are not perfectly parallel) Exo 2:6; Pro 5:22; Eze 10:3 (cf. Gesenius' Gramm. 121, 6, Anm. 3). ויתו, from תּוה, to make signs, i.e., to scribble. The lxx and Vulgate render it ἐτυμπανίζειν, impingebat, he drummed, smote with his fists upon the wings of the door, which would make it appear as if they had read ויּתף (from תּפף), which seems more suitable to the condition of a madman whose saliva ran out of his mouth.

David has now quite taken leave both of Saul's court and of his camp, has bidden farewell to his alter idem - his other self, the beloved Jonathan; and henceforward to the end of this book he is looked upon and treated as an outlaw and proclaimed a traitor. We still find him shifting from place to place for his own safety, and Saul pursuing him. His troubles are very particularly related in this and the following chapters, not only to be a key to the Psalms, but that he might be, as other prophets, an example to the saints in all ages, "of suffering affliction, and of patience," and especially that he might be a type of Christ, who, being anointed to the kingdom, humbled himself, and was therefore highly exalted. But the example of the suffering Jesus was a copy without a blot, that of David was not so; witness the records of this chapter, where we find David in his flight, I. Imposing upon Abimelech the priest, to get from him both victuals and arms (Sa1 21:1-9). II. Imposing upon Achish, king of Gath, by feigning himself mad (Sa1 21:10-15). Justly are troubles called temptations, for many are by them drawn into sin.

21:12-13 The lengthy title of Ps 34 refers to this incident but names the Philistine king Abimelech rather than Achish. “Abimelech” might have been the common title for Philistine kings (in Hebrew it means “my father the king”). The name Abimelech also appears in Gen 20:2; 26:1.