Saying (legontas). Accusative present active participle agreeing with “the eleven and those with them” in Luk 24:33.
Indeed (ontōs). Really, because “he has appeared to Simon” (ōpthē Simōni). First aorist passive indicative of horaō. This is the crucial evidence that turned the scales with the disciples and explains “indeed.” Paul also mentions it (1Co 15:5).