The Man that is Escanor「エスカノールという男 Esukanōru to iu Otoko」 is the 327th chapter of the manga, Nanatsu no Taizai.
As "The One", Escanor fights blow to blow with the Demon King as the other Sins watch on. As noon passes "The One" appears to run out, but just as it appears the Demon King has landed a decisive blow "The One" suddenly flares back up again.
Q353. Kobito-zoku-san (From Kyoto): Does Baccho-sensei "baccho" in Hikari to Yami no Grand Cross?
Nakaba: I won't do it with such a simple name (lol).