Shmuel Alef 21:12-13

And the avadim of Akhish said unto him, Is not this Dovid Melech HaAretz? Did they not sing one to another of him in dances, saying, Sha'ul hath slain his thousands, and Dovid his myriads? And Dovid laid up these devarim in his levav, and was very much afraid of Akhish Melech Gat.