Ecclesiastes 4:9
"Two are better than one; because they have a good reward for their labour."
Cross References (ranked by relevance)
Iron sharpeneth iron; so a man sharpeneth the countenance of his friend.
And the LORD God said, It is not good that the man should be alone; I will make him an help meet for him.
I am not able to bear all this people alone, because it is too heavy for me.
And he called unto him the twelve, and began to send them forth by two and two; and gave them power over unclean spirits;
And he that reapeth receiveth wages, and gathereth fruit unto life eternal: that both he that soweth and he that reapeth may rejoice together.
The LORD recompense thy work, and a full reward be given thee of the LORD God of Israel, under whose wings thou art come to trust.
And the LORD stirred up the spirit of Zerubbabel the son of Shealtiel, governor of Judah, and the spirit of Joshua the son of Josedech, the high priest, and the spirit of all the remnant of the people; and they came and did work in the house of the LORD of hosts, their God,
As they ministered to the Lord, and fasted, the Holy Ghost said, Separate me Barnabas and Saul for the work whereunto I have called them.