Shloka 20 & 21

अथ व्यवस्थितान्दृष्ट्वा धार्तराष्ट्रन् कपिध्वजः

प्रवृत्ते शस्त्रसम्पाते धनुर्द्यम्य पाण्डवः ll  (श्लोक २०)

हृषीकेशं तदा वाक्यमिदमाह महीपते

अर्जुन उवाच

सेनयोरुभयोर्मध्ये रथम स्थापय मेऽच्युत ll (श्लोक २१)

Ath vyawasthitaandrishtwa dhartrashtrain kapidhwajah

Pravrtite shastrasampate dhanurdyamya pandawah ll (Shloka 20)

Hrishikesham tada wakyamidmaah mahipate

Arjun Uwach

Senyorubhyormadhye ratham sthapay meachyut ll (Shloka 21)

Morphophonology (संधि - विच्छेद)

Ath vyawasthi taan drishtwa dhart rashtrain kapi dhwajah

Pravrtite Shastra sampate dhanur dyamya pandawah ll (Shloka 20)

Hrishikesham tada wakya mid maah mahi pate

Arjun Uwach

Senyorubhyor madhye ratham sthapay me achyut ll (Shloka 21)

Commentary

Then, seeing the followers of Dhritrashtrain battle array, when the missiles (arms) were about to be fired, the monkey bannered

( kapidhwajah, कपिध्वजः) Arjuna lifted his Bow (Shloka 20)

And he spoke Oh King (O Dhritrashtra: as spoken to Dhritrashtra by Sanjay) addressing Sri Krishna Oh Acyut (Krishna)! Station the chariot between the two armies. (Shloka 21)