His sacrificial rites and presents were obstructed by Rakshasas. It was at this time that Nahusha yoked that foremost of Rishis, viz., Agastya, to his car.
ततोऽस्य यज्ञविषयो रक्षोभिः पर्यबध्यत। अथागस्त्यमृषिश्रेष्ठं वाहनायाजुहाव ह॥