Ecclesiastes 4:9-12

9 Two are better than one, because they have a good reward for their toil.
10 For if they fall, one will lift up the other; but woe to one who is alone and falls and does not have another to help.
11 Again, if two lie together, they keep warm; but how can one keep warm alone?
12 And though one might prevail against another, two will withstand one. A threefold cord is not quickly broken.