Mahabharata 3.185.30

3.185.30

bījāni caiva sarvāṇi yathoktāni mayā purā |
tasyāmārohayernāvi susaṃguptāni bhāgaśaḥ || 30 ||

And when it was thrown into the sea by Manu, it said these words to him with a smile, 'O adorable being, thou hast protected me with special care; do thou now listen to me as to what thou shouldst do in the fulness of time! O fortunate and worshipful sir, the dissolution of all this mobile and immobile world is nigh at hand. The time for the purging of this world is now ripe. Therefore do I now explain what is good for thee! The mobile and immobile divisions of the creation, those that have the power of locomotion, and those that have it not, of all these the terrible doom hath now approached. Thou shall build a strong massive ark and have it furnished with a long rope. On that must thou ascend, O great Muni, with the seven Rishis and take with thee all the different seeds which were enumerated by regenerate Brahmanas in days of yore, and separately and carefully must thou preserve them therein. And whilst there, O beloved of the Munis, thou shall wait for me, and I shall appear to thee like a horned animal, and thus, O ascetic, shall thou recognise me! And I shall now depart, and thou shall act according to my instructions, for, without my assistance, thou canst not save thyself from that fearful flood.' Then Manu said unto the fish, 'I do not doubt all that thou hast said, O great one! Even so shall I act!' And giving instructions to each other, they both went away.