Known sourcecanonical
"First, then, a woman will or won't, depend on 't; If she will do 't, she will; and there 's an end on 't. But if she won't, since safe and sound your trust is, Fear is affront, and jealousy injustice."
Aaron Hill / Zara. Epilogue.
Zara. Epilogue.
Bartlett's Familiar Quotations, 9th ed. (Little, Brown, 1905), public domain