Sutra:
223. kaiyum uzhavukOlum pidiththa siRuvAykkayiRum SEnAthULi thUSarithamAna thirukkuzhalum thErukkuk kIzhE nARRina thiruvadigaLumAy niRkiRa Sarathya vEshaththai mAmenRu kAttugiRAn.

Sri PBA Swami's Sarartha Deepikai:
Of all these qualities, it is saulabhyam that is most desired. Therefore, this saulabhyam is stressed with the mAm through the fact that not only was He born in this world, amazingly He is now standing as a charioteer.

By saying 'mAm', He is refering to Himself in the role of the charioteer, with the stick that He holds in His divine hand to control the horses and the small whip used to direct the horses, the divine hair on which dust due to the movement of the armies has settled beacuse it was exposed and the divine feet with its small anklet which are dangling under the chariot.