ESV: David said to Achish, "Very well, you shall know what your servant can do." And Achish said to David, "Very well, I will make you my bodyguard for life."
NIV: David said, "Then you will see for yourself what your servant can do." Achish replied, "Very well, I will make you my bodyguard for life."
NASB: David said to Achish, 'Very well, you will learn what your servant can do.' So Achish said to David, 'Then I will assuredly make you my bodyguard for life!'
CSB: David replied to Achish, "Good, you will find out what your servant can do." So Achish said to David, "Very well, I will appoint you as my permanent bodyguard."
NLT: Very well!' David agreed. 'Now you will see for yourself what we can do.' Then Achish told David, 'I will make you my personal bodyguard for life.'
KJV: And David said to Achish, Surely thou shalt know what thy servant can do. And Achish said to David, Therefore will I make thee keeper of mine head for ever.
NKJV: So David said to Achish, “Surely you know what your servant can do.” And Achish said to David, “Therefore I will make you one of my chief guardians forever.”