Hark back, not hearken back.
https://www.google.com/search?q=hearken+back&sca_esv=575491276&sxsrf=AM9HkKn3kLTLsBgu0IxIRFHG4T8VUQ6zFw%3A1697922041365&ei=-Ts0Zd_sFbGt5NoPvoiw2AQ&ved=0ahUKEwifzYbBhIiCAxWxFlkFHT4EDEsQ4dUDCBA&uact=5&oq=hearken+back&gs_lp=Egxnd3Mtd2l6LXNlcnAiDGhlYXJrZW4gYmFjazIIEAAYigUYkQIyBRAAGIAEMgUQABiABDIFEAAYgAQyCBAAGBYYHhgPMggQABgWGB4YDzIIEAAYFhgeGA8yCBAAGBYYHhgPMggQABgWGB4YDzIIEAAYFhgeGA9I9RRQ-wFYqBFwAXgBkAEAmAFnoAGmA6oBAzQuMbgBA8gBAPgBAcICChAAGEcY1gQYsAPCAgoQABiKBRiwAxhDwgIQEC4YigUYxwEY0QMYsAMYQ8ICCBAAGIAEGLEDwgIKEAAYgAQYFBiHAuIDBBgAIEGIBgGQBgo&sclient=gws-wiz-serp