Charles Ellicott Commentary Judges 16:7

"And Samson said unto her, If they bind me with seven green withes that were never dried, then shall I become weak, and be as another man." — Judges 16:7 (ASV)

Green withs. —The meaning of the words is uncertain. Probably the Septuagint and the Vulgate are right in taking them to mean moist, i.e., fresh sinews (Psalms 11:2) (LXX, Neurais hugrais; Vulgate, Nerviceis funibus necdum siccis et adhuc humentibus). Josephus says “vine shoots,” but fresh vine shoots would be ridiculously inadequate. The number seven is used as the sacred number implying perfectness; and it is one of the signs that even this early Samson is playing about on the confines of his secret.

As another man. —Literally, as one man, i.e., as an ordinary man.