The man who rode it is Indra. The dung of the Bull, which you ate is Ambrosia. Certainly on account of this (eating) you were not slain in the land of the Nagas.
यश्चैनमधिरूढः पुरुषः स चेन्द्रो यदपि ते भक्षितं तस्य ऋषभस्य पुरीषं तदमृतं तेन खल्वसि तस्मिन्नागभवने न व्यापन्नस्त्वम्॥