Some early alchemical writings seem to have their origins in the Kaula tantric schools associated to the teachings of the personality of Matsyendranath.
sˌʌm ˈɜːli ælkˈɛmɪkəl ɹˈaɪɾɪŋz sˈiːm tə hæv ðɛɹ ˈɔːɹɪdʒˌɪnz ɪnðə kˈɔːlə tˈæntɹɪk skˈuːlz ɐsˈoʊsɪˌeɪɾᵻd tə ðə tˈiːtʃɪŋz ʌvðə pˌɜːsənˈælᵻɾi ʌv mˈætsɪˌɛndɹɐnˌæθ.