Matsyapurana 34.24

34.24

mama kāmaḥ sa ca kṛtaḥ pūruṇā putrarūpiṇā
śukreṇa ca varo dattaḥ kāvyenośanasā svayam //

Yayâti:—“Brâhmaṇas and others! Hearken. My eldest son did not obey my commands. I therefore do not give him the empire; for a disobedient son ought not to be recognised. This is what the great men have said; and Turvasu, Druhya and Aṇu also disobeyed me. Puru stood firm and obeyed my behests; therefore, he alone is entitled to my monarchy. It is he who exchanged his full flourish of youth with my infirmity, and it is through him that I have fulfilled all my desires. The sage Śukra had also blessed that one who would carry out my orders would be the Emperor. For these reasons, you should all consider Puru to be fit for the Empire.”—19-25.