The spelling of the word "hast say" may seem unusual, but it is actually an old-fashioned way of saying "you have said." The word "hast" is a conjugation of the verb "have" in the second person singular form, which was commonly used in Early Modern English. The spelling "say" is simply the regular spelling of the word. In IPA phonetic transcription, "hast say" would be pronounced as /hæst seɪ/. While this spelling may not be common today, it is still used in literature and poetry as a nod to the past.