John Gill
INTRODUCTION TO FIRST SAMUEL 21 This chapter relates that David went to Nob, and pretending he was on secret business for the king, got shewbread, and the sword of Goliath, from Ahimelech the priest, 1 Samuel 21:1; and that passing from thence to Gath, where he was known, through fear feigned himself mad, and so escaped from thence, 1 Samuel 21:10.
John Gill
And David laid up these words in his heart,.... Pondered upon them, and thought them over in his mind, finding that he was known, and his character also, and considered with himself what might be the consequence of this: and was sore afraid of Achish the king of Gath; lest he should be set against him, and be prevailed upon by his servants to take away his life, or deliver him up into the hands...
Matthew Henry
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...