GRC

Bailly

v. εἰς.
Bailly 2020 Hugo Chávez Gérard Gréco, André Charbonnet, Mark De Wilde, Bernard Maréchal & contributeurs / Licence Creative Commons Attribution - Pas d'Utilisation Commerciale - Pas de Modification — « CC BY-NC-ND 4.0 »

LSJ

Ion., old Att., Dor. form of εἰς ; all compounds must be sought under εἰς, except a few words which appear only in the form ἐς. Arc., = ἐκ, IG 5(2).6.49 (Tegea, iv BC), al. ; also Delph., BCH 23.611, and Arg., IG 4.492 (Mycenae, vi BC) ; v. ἐκ init.
Liddell-Scott-Jones, Greek-English Lexicon (9th ed., 1940)

Pape

ion. u. altatt. für εἰς.
Pape, Griechisch-deutsches Handwörterbuch (3. Aufl., 1914)
memory