A.T. Robertson Commentary Hebrews 11:29

"By faith they passed through the Red sea as by dry land: which the Egyptians assaying to do were swallowed up." — Hebrews 11:29 (ASV)

Which assaying to do (ης πιεραν λαβοντες). Literally, "of which taking trial" (second aorist active participle of λαμβανω, to take). The idiom πειραν λαμβανειν occurs in De 28:56, in N.T. only here and verse 36, though a classical idiom (Demosthenes, etc.).

Were swallowed up (κατεποθησαν). First aorist passive indicative of καταπινω, to drink down, to swallow down (Matthew 23:24).