Ecclesiastes 4:9-12

Two [are] better than one; because they have a good reward for their labour.

For if they fall, the one will lift up his fellow: but woe to him [that is] alone when he falleth; for [he hath] not another to help him up.

Again, if two lie together, then they have heat: but how can one be warm [alone]?

And if one prevail against him, two shall withstand him; and a threefold cord is not quickly broken.