Reference for Berakhot 30:25

אטו טעמיה דר' יהודה משום דכתיב וכתב טעמיה דר' יהודה משום דכתיב אלות אלות אין צואות לא

Dost thou suppose that R. Judah's reason is because the text states, "[And the priest] shall write"? His reason is because the text states, "[And the priest shall write] these curses," i.e. the curses shall be written, but not the words of the command.

Jastrow