Skandapurana 5.41.23

5.41.23

camatkārapuraṃ kṣetraṃ śakra siddhipradāyakam ..
tasmāttatra drutaṃ gatvā tadvadhārthaṃ tapaḥ kuru .. 23 ..

“The sacred field Camatkārapura, O Śakra, bestows perfections; / therefore, having gone there swiftly, perform austerity for his slaying.”