παρακαθίστημι
From LSJ
ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers
English (LSJ)
also παρακαθ-ιστάνω, J.AJ14.15.7:—
A set down beside, station or establish beside, στρατιώτας ὥσπερ ἐπόπτας π. D.4.25; πολιτείας ἐναντίας π. Isoc. 4.104, cf. IG12.46.9; π. ἐπίτροπόν τινι D.S.16.38, cf. PCair.Zen.199.7 (iii B. C.), PRev.Laws54.15 (iii B. C.):—Pass., παρακαθεσταμένος τινί being made his colleague, D.S.16.47.