O bestower of honour, it behoves you to accomplish first that task which is the most serious, with great activity. Of all these tasks therefore, I do think the task of aiding Arjuna should be accomplished first.
महार्थं लघुसंयुक्तं कर्तुमर्हसि मानद। तस्य मे सर्वकार्येषु कार्यमेतन्मतं महत्॥