Māradhītusutta

sn4.25:11.1 For if we had come on to any ascetic or brahmin like this who was not free of lust, his heart would explode, or he’d spew hot blood from his mouth, or he’d go mad or lose his mind.

sn4.25:11.2 He’d dry up, wither away, and shrivel up like a green reed that was mowed down.”