Matsya Purana 243.14

243.14

dṛṣṭe nimitte prathamamamaṅgalyavināśanam.
keśavaṃ pūjayedvidvān stavena madhusūdanam .. 243.13 ..

If there is thus seen one bad omen at the time of departure one should adore Viṣṇu and praise Madhusūdana and then resume his mission, but if there is another one for the second time he should return home —13 14