CC Ādi 16.69

daśa alaṅkāre yadi eka śloka haya
eka doṣe saba alaṅkāra haya kṣaya
Word for word: 
daśa alaṅkāre — with ten instances of literary ornamentation; yadi — if; eka — one; śloka — verse; haya — there is; eka doṣe — by one fault; saba — all; alaṅkāra — ornaments; haya kṣaya — become null and void.
Translation: 
“If there are ten literary ornaments in a verse but even one faulty expression, the entire verse is nullified.