Two are better than one; because they have a good reward for their labour.
Two (are) better than one. Two-opposed to "one" (Ecclesiastes 4:8). Ties of union, marriage, friendship, religious communion, are better than the selfish solitariness of the miser (Genesis 2:18).
Because they have a good reward - advantage accrues from their efforts being conjoined. They afford one another help, protection, and society. The Talmud says, 'A man without a companion is like a left land without the right.'