G0709
ἀριστάω
to eat early meal
ἀριστάω, -ῶ (ἄριστον), [in LXX: Gen.43:25 (לֶחֶם אָכַל), 1Ki.14:24 (לֶחֶם), 3Ki.13:7 (סָעַד), Tob.2:1 * ;] __1. prop., to breakfast: Jhn.21:12, 15 __2. In late Gk., to take a meal, dine: Luk.11:37.† (AS)
Full Thayer's lexicon entry
ἀριστάω — aristáō
ἀριστάω, ἀρίστω: 1 aorist ἠρίστησα; (τό ἄριστον, which see);
a. to breakfast: Joh 21:12; Joh 21:15; (Xenophon, Cyril 6, 4, 1; and often in Attic).
b. by later usage to dine: παρά τίνι, Luk 11:37; (Gen 43:24; Aelian v. h. 9, 19).
3 occurrences
Luke (1), John (2)