τοῖσι (toisi)
τοῖσι is an Ancient Greek form of ὁ, meaning “the; (Hom.) he, she, it; this, that”. It is the dative plural masculine pronoun.
Found 2,162 times in the Ancient Greek texts on Socratos.
Where it is used
Apollonius Rhodius, Argonautica 1.40: Λάρισαν δʼ ἐπὶ τοῖσι λιπὼν Πολύφημος ἵκανεν
Euripides, Heracleidae 1046: κατεργάσασθαι τοῖσί τʼ ἐξ ἡμῶν χρεών,
Hippocrates, Aphorismi 7.18.60: Τοὶσι σώμασι τοῖσιν ὑγρὰς τὰς σάρκας ἔχουσι δεῖ λιμὸν ἐμποιέειν· λιμὸς γὰρ ξηραίνει τὰ σώματα.
All forms of ὁ (declension table)
Source: Socratos (socratos.org), a free reader for Ancient Greek and Latin. Grammar from the Perseus Treebank and Morpheus; dictionary entries from Liddell-Scott-Jones, A Greek-English Lexicon (Perseus Digital Library, CC BY-SA). Counts are from the texts on Socratos.