2 Corinthians 9:7

9:7 Each one of you should give just as he has decided in his heart, not reluctantly or under compulsion, because God loves a cheerful giver.

Philippians 2:14

2:14 Do everything without grumbling or arguing,

Philemon 1:14

1:14 However, without your consent I did not want to do anything, so that your good deed would not be out of compulsion, but from your own willingness.

James 5:9

5:9 Do not grumble against one another, brothers and sisters, so that you may not be judged. See, the judge stands before the gates!