YOURSELVES

Pronoun

yourselves second person (the plural of yourself, the reflexive case of you)

You (plural), used as the object of a verb or preposition, referring to the people being spoken to, previously mentioned.

Source: Wiktionary

YOURSELF

Your*self", pron.; pl. Yourselves. Etym: [Your + self.]

Definition: An emphasized or reflexive form of the pronoun of the second person; -- used as a subject commonly with you; as, you yourself shall see it; also, alone in the predicate, either in the nominative or objective case; as, you have injured yourself. Of which right now ye han yourselve heard. Chaucer. If yourselves are old, make it your cause. Shak. Why should you be so cruel to yourself Milton. The religious movement which you yourself, as well as I, so faithfully followed from first to last. J. H. Newman.

Source: Webster’s Unabridged Dictionary 1913 Edition