Charles Ellicott Commentary Ezekiel 41:25

"And there were made on them, on the doors of the temple, cherubim and palm-trees, like as were made upon the walls; and there was a threshold of wood upon the face of the porch without." — Ezekiel 41:25 (ASV)

Thick planks—After stating that the doors just described were ornamented like the walls, the prophet speaks of something that was on the outer front of the porch. What this was is extremely doubtful, as the word is elsewhere used only in 1 Kings 7:6, of something in front of Solomon’s cloisters or “porch of pillars.” Perhaps the best suggestion is that it may have been a moulding of wood. The word in the original is in the singular.