Śatapatha Brāhmaṇa ("of a hundred paths") 3.2.1.27

3.2.1.27

sa ha saṃvatsare jāyamāna īkṣāṃ cakre | mahāvīryā vā iyaṃ yoniryā māmadīdharata yadvai meto mahadevābhvaṃ nānuprajāyeta yanmā tannābhibhavediti

Now when he was born after a year's time, he thought within himself, 'Verily of great vigour is this womb which has contained me: [I must take care] that no great monster shall be born from it after me, lest it should get the better of me!'