A.coarse cloth of hair, esp. of goats' hair, “σάκκος τρίχινος” Apoc.6.12, cf. LXX Is.50.3, Si.25.17.
II. anything made of this cloth:
3. coarse garment, sackcloth, worn as mourning by the Jews, LXX Ge.37.34, Ev.Luc.10.13, J.BJ2.12.5, cf. Plu.2.239c.
III. coarse beard, like rough hair-cloth, “σάκον πρὸς ταῖν γνάθοιν ἔχειν” Ar.Ec.502; cf. “σακεσφόρος” 11.—The form σάκος is said to be Att., Ael.Dion.Fr.296, Phryn.229, Moer. p.354 P., Thom.Mag. p.344 R., etc.; while σάκκος is called Dor. by Phryn. l.c., Hellenic by Moer. and Thom.Mag. ll.cc., Comic by Poll.7.191. In Ar.Ach. 822, Ec.502, σάκος is required by the metre, as is σάκκος in Ach. 745 (Megarian), and in Hippon. l.c.; codd. of Hdt. give σάκκος. Inscrr. have “σάκος” IG22.1672.73,74, 108 and σάκκος ib.198: Papyri have “σάκος” PCair.Zen.753.27 (iii B.C.), UPZ84.52 (ii B.C.), but oftener “σάκκος” PSI4.427.1,14 (iii B.C.), PTeb.116.3 (ii B.C.), etc. (Prob. the word, like the thing, was borrowed from Phoenicia, cf. Hebr. saq.）