Mudgalapurana 8.49.30

8.49.30

mātā pitā'yaṃ jagatāṃ pareṣāṃ tasyā'pi mātā janakādikaṃ na |
śreṣṭhaṃ vadante nigamāḥ pareśaṃ taṃ jyeṣṭharājaṃ praṇamāmi nityam ||

He is the mother and father of other worlds, but he has no mother, father, or other [progenitor];
the Vedas declare the supreme lord to be the highest (jyeṣṭha). To that Jyeṣṭharāja I bow eternally.