The Govinda that best of charioteers took up the reins (of Arjuna's steeds)., like Matali taking up the reins of Indra's horses, when the latter went to fight in order to slay Vritra.
अथ जग्राह गोविन्दो रश्मीन् रश्मिविदां वरः। मातलिसिवस्येव वृत्रं हन्तुं प्रयास्यतः॥