Ramayana
एतदाख्यानमायुष्यं सभविष्यं सहोत्तरम् । कृतवान्प्रचेतसः पुत्रस्तद्ब्रह्माप्यन्वमन्यत ॥ 7-111-10 ॥
This life-bestowing narrative, together with what is to come and together with its concluding portion, was composed by the son of Prachetas, and Brahma himself approved it.
english translation