James 5:9 (NIV)
Don't grumble against each other, brothers, or you will be judged. The Judge is standing at the door!
Philippians 2:14-16 (NIV)
Do everything without complaining or arguing, 15 so that you may become blameless and pure, children of God without fault in a crooked and depraved generation, in which you shine like stars in the universe 16 as you hold out the word of life--in order that I may boast on the day of Christ that I did not run or labor for nothing.
Philippians 4:11 (NIV)
I am not saying this because I am in need, for I have learned to be content whatever the circumstances.