LSJ
τό, temple of Sarapis, SIG 663.14 (Delos, iii/ii BC), PCair. Zen. 34.13 (iii BC), UPZ 122.6 (ii BC), Plb. 4.39.6; contr. Σαραπεῖον or Σεραπεῖον, τό, CIG 4401, Plu. Alex. 76, D.C. 66.24; Σαράπιον or Σεράπιον, Str. 17.1.10, CIG 2715b. 4 (Caria); — Σαραπιεῖα, τά, festival at Tanagra, IG 7.540.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)