Mahabharata 9.57.49

यक्षाणां राक्षसानां च पिशाचानां तथैव चअन्तरिक्षे महानादः श्रूयते भरतर्षभ

yakṣāṇāṃ rākṣasānāṃ ca piśācānāṃ tathaiva caantarikṣe mahānādaḥ śrūyate bharatarṣabha

Our plain-language meaning of this verse is waiting for scholar review.