Matsya Purana 207.24

207.24

śvetantu jaṭharaṃ yasya bhavet pṛṣṭhaṃ ca gopateḥ.
vṛṣabhaḥ sa samudrākhyaḥ satataṃ kulavardhanaḥ .. 207.24 ..

The bull whose stomach and back are white is called Samudra and increases the progeny of the family The bull of the colour of jasmin or having variegated circular spots is considered to increase the wealth of the donor—24 25