Psalm 133/Notes/Phrasal.v. 3.607202
From Psalms: Layer by Layer
v. 3 – עַד־הָעוֹלָם is a variation of עַד־עוֹלָם, with little to no difference in meaning (see, e.g., Ps 106:31, 48; 1 Chr 17:14, which attest to both constructions). Nevertheless, עַד־הָעוֹלָם is much less frequent—occurring only seven times—and is highly concentrated in passages belonging to Transitional Biblical Hebrew (exilic) and Late Biblical Hebrew (post-exilic), as attested in Ps 106:48 (= 1 Chr 16:36); Neh 9:5 and 1 Chr 17:14, with the possible exceptions of Pss 28:9 and 41:14.