The first occurrence.
And God called, with regard to the light, Day, and with regard to the darkness, He called Night. And there was evening and there was morning, one day. Gen 1:5
The primitive root.
Strong’s H6153 erev, a concrete noun meaning, “evening;” from Strong’s H6150 ארב arav, a primitive root meaning, “to grow dark.” The 3-letter root is ayin + resh + bet, but according to the Ancient Hebrew Lexicon, the ayin was originally the obsolete letter ghah.
ghah § = rope, thus twisted, goat, dark, negative
resh ר = the head of man, thus head, first, top, beginning, man
bet ב = the house, thus house, household, family, in, within
The story: When it grows dark (ghah), the man (resh) returns to his home (bet).