Devibhagavatapurana 4.1.17

4.1.17

yau cakratustapaścograṃ muktyarthaṃ munisattamau |
tau kathaṃ prāpaturdehau prāptayogau mahātapau ||

And also when those two Munis had attained liberation, their goal in their Yogas, by performing severe penances, how could they again be born in other bodies!