for the sake of somebody/something
for the sake of
1. Also for one's sake. Out of consideration or regard for a person or thing; for someone's or something's advantage or good. For example, For Jill's sake we did not serve meat, or We have to stop fighting for the sake of family unity. [Early 1200s]
2. For the purpose or motive of, as in You like to quarrel only for the sake of an argument. [Early 1200s]
3. for God's sake. Also for goodness or heaven's or Pete's or pity's sake . An exclamation showing surprise, impatience, anger, or some other emotion, depending on the context. For example, For God's sake, I didn't expect to see you here, or Hurry up, for goodness sake, or For heaven's sake, how can you say such a mean thing? or For pity's sake, finish your dinner. The variants are euphemisms for God. [c. 1300] For a synonym, see for the love of, def. 2.