LSJ
τό, eve of the sabbath, LXX Ju. 8.6, Ev. Marc. 15.42, Bull. Inst. franc. d΄Arch. orientale 30.5.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)
TBESG
προ-σάββατον, -ου, τό
[in LXX: Psa.92:1-15 title. א (שַׁבָּת) שַׁבָּת) Psa.93:1-5 title., Jdth.8:6 * ;]
the day before the Sabbath: Mrk.15:42 (L, Tr., txt., πρὸς σ.).†
(AS)
Translators Brief lexicon of Extended Strongs for Greek based on Abbot-Smith, A Manual Greek Lexicon of the New Testament (1922) (=AS), with corrections and adapted by Tyndale Scholars