Ādittapariyāyasutta

sn35.235:6.1 You’d be better off sleeping.

sn35.235:6.2 For I say that sleep is useless, fruitless, and folly for the living. But while you’re asleep you won’t fall under the sway of such thoughts that would make you create a schism in the Saṅgha.

sn35.235:6.3 I speak having seen this drawback.