New Revised Standard Version
Now David had said, “Surely it was in vain that I protected all that this fellow has in the wilderness, so that nothing was missed of all that belonged to him; but he has returned me evil for good.

Contemporary English Version
David had just been saying, "I surely wasted my time guarding Nabal's things in the desert and keeping them from being stolen! I was good to him, and now he pays me back with insults.

New American Bible
David had just been saying: “Indeed, it was in vain that I guarded all this man’s possessions in the wilderness, so that nothing of his was missing. He has repaid good with evil.

Douay-Rheims Bible
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.

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.

Surely

1 Samuel 25:13 Then David said to his young men: Let every man gird on his sword. And they girded on every man his sword. And David also girded on his sword: and there followed David about four hundred men, and two hundred remained with the baggage.

Job 30:8 The children of foolish and base men, and not appearing at all upon the earth.

Psalm 37:8 Cease from anger, and leave rage; have no emulation to do evil.

Ephesians 4:26,31 Be angry: and sin not. Let not the sun go down upon your anger. . . .

1 Thessalonians 5:15 See that none render evil for evil to any man: but ever follow that which is good towards each other and towards all men.

1 Peter 2:21-23 For unto this are you called: because Christ also suffered for us, leaving you an example that you should follow his steps. . . .

1 Peter 3:9 Not rendering evil for evil, nor railing for railing, but contrariwise, blessing: for unto this are you called, that you may inherit a blessing.

he hath requited

Genesis 44:4 And when they were now departed out of the city, and had gone forward a little way: Joseph sending for the steward of his house, said: Arise, and pursue after the men: and when thou hast overtaken them, say to them: Why have you returned evil for good?

Psalm 35:12 They repaid me evil for good: to the depriving me of my soul.

Psalm 38:20 They that render evil for good, have detracted me, because I followed goodness.

Psalm 109:3-5 They have spoken against me with deceitful tongues; and they have compassed me about with words of hatred; and have fought against me without cause. . . .

Proverbs 17:13 He that rendereth evil for good, evil shall not depart from his house.

Jeremiah 18:20 Shall evil be rendered for good, because they have digged a pit for my soul? Remember that I have stood in thy sight, to speak good for them, and to turn away thy indignation from them.

Romans 12:21 Be not overcome by evil: but overcome evil by good.

1 Peter 2:20 For what glory is it, if, committing sin and being buffeted for it, you endure? But if doing well you suffer patiently: this is thankworthy before God.

1 Peter 2:17 Honour all men. Love the brotherhood. Fear God. Honour the king.