'Two' in the Bible

It's better to have one handful of tranquility than to have two handfuls of trouble and to chase after the wind.

Two are better than one, because they have a good return for their labor.

Again, if two lie close together, they will keep warm, but how can only one stay warm?

If someone attacks one of them, the two of them together will resist. Furthermore, the tri-braided cord is not soon broken.