Never look a gift horse in the mouth.
More English Proverbs:
Sticks and stones will break my bones, but names will never hurt me.English
Elbow grease is the best polish.
English
It's the squeaky wheel that gets the grease.
English
It's the squeaky wheel that gets the grease.
English
Where ignorance is bliss, 'tis folly to be wise.
English
When it thunders in March, it brings sorrow.
English