In plain words
When Droṇa, who knows every vidyā, every śāstra, every Upaniṣad and every rule, enters into adharma and goes so far along a wrong path, to catch him by any means at all on that very wrong path is dharma indeed, not adharma,’ He said. Here a new doubt may arise in you. For Droṇācārya, a guru, to make war on his disciples is wrong, surely. In the same way a doubt may come: is it not adharma for the Pāṇḍavas, his disciples, to make war on Droṇācārya? But in this, adharma cannot be pinned on the Pāṇḍavas' heads. From the very first the Pāṇḍavas kept to the sacred path alone. Not only that: they have always borne God's command on their heads. Not even for a moment did they transgress God's command. Such sacred Pāṇḍavas reached the battlefield, and at once, at the moment when both sides stood ready and were blowing their conches, Dharmaja took off his sandals, crown and armour, set them aside, folded his hands and walked straight on foot to Droṇācārya. When they saw Dharmaja walk over to the Kauravas' side like this, with folded hands, while both sides stood ready and watching, all the Kauravas too were shouting, ‘Dharmaja is coming to surrender; they are defeated!’ On the other side, Bhīma and Arjuna were flexing their muscles and rolling their eyes. They too misunderstood: ‘What is this, so little sense, he is begging them to accept his surrender on the battlefield!’ But Kṛṣṇa knew the inner meaning. That is just why Kṛṣṇa said, ‘Arjuna, Bhīma, from the very beginning your habit has been to follow your elder brother; today too; whether it is good or bad you can think over later; now, to follow your elder brother is dharma. Put your dress aside and follow your elder brother,’ He said. Kṛṣṇa's command could not be overstepped. So: ‘Well, this brother of ours played dice even when told not to. He fell into all sorts of troubles, and today too he is following this kind of path. Whatever may come of it, we bear Kṛṣṇa's command on our heads,’ they said. Taking off their sandals, crowns and armour, the five set out after their elder brother, one behind the other.