After go the subsequent a may optionally be retained everywhere, in the Vedas as well as in the secular literature.,
Thus गोऽग्रं or गो अग्रं ॥ In the Vedas also अपशवो वा अन्ये गो अश्वेभ्यः, पशवो गोऽश्वाः ॥,
सर्वत्र विभाषा गोः
Adhyāya 6 · Pāda 1 · Rule 122