Meaning
The expression (Prov 23:31), "when it giveth his colour in the cup," is literally, "when it giveth out [or showeth] its eye." The beads or bubbles of wine are thus spoken of. "To set the eyes" on any one is to view him with favour (Gen 44:21; Job 24:23; Jer 39:12). This word is used figuratively in the expressions an "evil eye" (Matt 20:15), a "bountiful eye" (Prov 22:9), "haughty eyes" (6:17 marg.), "wanton eyes" (Isa 3:16), "eyes full of adultery" (2Pet 2:14), "the lust of the eyes" (1John 2:16). Christians are warned against "eye-service" (Eph 6:6; Col 3:22). Men were sometimes punished by having their eyes put out (1Sam 11:2; Samson, Judg 16:21; Zedekiah, 2Kings 25:7).
The custom of painting the eyes is alluded to in 2Kings 9:30, R.V.; Jer 4:30; Ezek 23:40, a custom which still prevails extensively among Eastern women.