ðɪs ɪz dˈʌn bɪkˈʌz ðə ɹᵻkwˈaɪɚd nˈaɪnti wˈʌn ɹᵻsˈaɪɾəlz ɪn ˈɑːnɚɹ ʌvðə jæzˈɑːɾəz wʊd ɪn pɹˈɪnsɪpəl ɹᵻkwˈaɪɚ ˈiːtʃ əv ðə θˈɜːɾi hˈɪmz ɐsˈoʊsɪˌeɪɾᵻd wɪððə dᵻvˈɪnᵻɾiz ʌvðə θˈɜːɾi dˈeɪz təbi ɹᵻsˈaɪɾᵻd θɹˈaɪs wɪð wˈʌn ɐdˈɪʃənəl wˌʌn.
This is done because the required 91 recitals in honor of the Yazatas would in principle require each of the 30 hymns associated with the divinities of the 30 days to be recited thrice with one additional one.