Bhagavad Gita: Chapter 1, Verse 21

 अर्जुन उवाच |

                    सेनयोरुभयोर्मध्ये रथं स्थापय मेऽच्युत || 21||

                                                                        arjuna uvācha
                                senayor ubhayor madhye rathaṁ sthāpaya me ’chyuta

Arjun said: O Infallible One, please take my chariot to the middle of both armies, so that I may look at the warriors arrayed for battle, whom I must fight in this great combat.

Arjun was a skilled warrior, and the most powerful Hanuman was sitting on top of his magnificent chariot. Moreover, his devotion towards the Supreme Lord Shree Krishna was such that, the Lord himself had agreed to be Arjun’s charioteer. Here, Arjun was seated on the passenger seat giving instructions to Shree Krishna, his charioteer. He addresses the Lord as Achyuta, the most dependable One and requests him to place the chariot in the middle of the battlefield.