Pronoun
each other
(reciprocal pronoun) To one another; one to the other; signifies that a verb applies to two or more entities both as subjects and as direct objects:
Jack and Robert loved each other.
The Godhead is, to speak concisely, undivided there is one mingling of Light, as it were of three suns joined to each other. Gregory of Nazianzus
God in His goodness has arranged things perfectly, so that with our gifts, we can help each other, and with our faults, we can be humbled by each other. For every person has some gifts; but everyone also has some faults which one must struggle to overcome. Paisios of Mount Athos
Marriage is the key of moderation, the harmony of desires, the seal of a deep friendship ... the unique drink from a fountain enclosed, inaccessible to those without. United in the flesh, one in spirit, they urge each other on by their mutual love. Gregory of Nazianzus
Dogs understand each other by their barking, and men by their words. Somali Proverb
Dogs that fight each other will join forces against the wolf. Armenian Proverb
Seamen learn to get to know each other during a storm. Corsican Proverb