कोसलेषु द्विजो भूत्वा भूत्वा वङ्गेषु तित्तिरिः ।अश्वो भूत्वा तुषारेषु जातस्त्वं ब्रह्मणोऽध्वरे
In plain words
Having been a dvija among the Kosalas, having been a partridge among the Vaṅgas, having been a horse among the Tuṣāras -- you were born at Brahmā's sacrifice.