What does 1 Samuel 25:21 mean?

Now David had said, Surely in vain have I kept all that this fellow hath in the wilderness, so that nothing was missed of all that pertained unto him: and he hath returned me evil for good.

Now David had said, Surely in vain have I kept all that this fellow hath in the wilderness, so that nothing was missed of all that pertained unto him: and he hath requited me evil for good.

Now David had said, Surely in vain have I kept all that this fellow hath in the wilderness, so that nothing was missed of all that pertained unto him: and he hath returned me evil for good.

Now David had said, What was the use of my taking care of this man's goods in the waste land, so that there was no loss of anything which was his? he has only given me back evil for good.

And David said, `Only, in vain I have kept all that this <FI>one<Fi> hath in the wilderness, and nothing hath been looked after of all that he hath, and he turneth back to me evil for good;

And David said: Truly in vain have I kept all that belonged to this fellow in the wilderness, and nothing was lost of all that pertained unto him: and he hath returned me evil for good.

Now David had said, Surely, in vain have I kept all that this [man] had in the wilderness, so that nothing was missed of all that was his; and he has requited me evil for good.