μὴ κακὸν εὖ ἔρξῃς· σπείρειν ἴσον ἔστ' ἐνὶ πόντῳ → do no good to a bad man; it is like sowing in the sea
spīcĭlĕgĭum: ii, n. spica-lego,
I a gleaning, leasing of ears of corn after gathering (very rare): messi facta spicilegium venire oportet, Varr. R. R. 1, 53; id. L. L. 7, § 109 Müll.