Parallel
Psalms 126:4
Rahlfs Septuagint (1935) · Berean Standard Bible
ὡσεὶ βέλη ἐν χειρὶ δυνατοῦ οὕτως οἱ υἱοὶ τῶν ἐκτετιναγμένων
127:4
Like arrows in the hand of a warrior, so are children born in one’s youth.