Ecclesiastes 4:11

4:11 Furthermore, if two lie down together, they can keep each other warm,

but how can one person keep warm by himself?

Ecclesiastes 7:18

7:18 It is best to take hold of one warning without letting go of the other warning;

for the one who fears God will follow both warnings.

Ecclesiastes 8:9

8:9 While applying my mind to everything that happens in this world, I have seen all this:

Sometimes one person dominates other people to their harm.