iti—thus; labdha-vyavasthanah—getting the opportunity to exchange his old age; putram—unto his son; jyestham—the eldest; avocata—he requested; yado—O Yadu; tata—you are my beloved son; praticcha—kindly exchange; imam—this; jaram—invalidity; dehi—and give; nijam—your own; vayah—youth.