Targum su Deuteronomio 32:3

Woe to the wicked who make memorial of the Holy Name with blasphemies. Wherefore Mosheh, who was the Doctor of Israel, would not permit himself to pronounce the Holy Name until he had dedicated his mouth at the beginning of his hymn with eighty and five letters, making twenty and one words, and afterwards be spake: In the Name of the Lord I invoke you, O house of Israel, to ascribe glory and greatness before our God.

Mosheh the prophet said: Woe to the wicked who make memorial of the Holy Name with blasphemies. For it is not possible even to one of the highest angels to utter that Name rightly until that they have said, Holy, Holy, Holy thrice. And from them did Mosheh learn not to utter that Name openly until he should have dedicated his mouth with twenty-one words which consist of eighty-five letters; and so explained he and said: Hear, ye heavens, and I will speak; for it is the Name of the Lord. Mosheh the prophet said: O people of Israel, I invoke you, in the Name of the Lord, to give glory, praise, and highest exaltation unto God.