Permission To Use Flame Chant In A Novel?

E.A. ,

I have recently written a fiction novel, and in the opening chapter I used one of your chants in a ritual one of my characters preforms. I had written a formal letter requesting you permission to use the chant, “Itz rachu montantu, Ves vachu Kel tamu, Itz ranta monkala, Mont altu vel tasu, Veskala Itz rachu, Metantu Valchatza!”, but was unable to find a direct email or contact. Understandably so.
Is this considered something anyone may use freely since it is a chant? Or intellectual property where the source must be cited? I would humbly ask your permission to use it in my work. With much appreciation and thanks,