Skandapurana 2.7.0.p11

2.7.0.p11

adhyāyaḥ 11 maithilanṛpeṇa vaiśākhadharmaprasiddhikaraṇam, tena sarvajanānāṃ sadgatiprāptyā narakāṇāṃ śūnyatayā khinnasya yamasya brahmasamīpe gamanam

Chapter 11: The King of Mithilā makes the religious duties of Vaiśākha renowned; Yama, grieving due to the emptiness of the hells because all people attain a good rebirth thereby, approaches Brahmā.