1 Samuel 30:13-14

13David asked the man, ‘Who is your master? Where do you come from?’ The young man answered, ‘I am an Egyptian, the slave of an Amalekite man. My master left me here three days ago because I was ill.

14We had attacked the south part of Judah, where the Kerethites live. We also attacked the land where the people of Caleb's clan live. We destroyed Ziklag with fire too.’