The LORD is their strength, and he is the saving strength of his anointed.
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Augustine of Hippo
8. "The Lord is the strength of His people" (ver. 8). Not that people "ignorant of the righteousness of God, and willing to establish their own." For they thought not themselves strong in themselves: for the Lord is the strength of His people, struggling in this life's difficulties with the devil. "And the protector of the salvation of His Christ." That, having saved them by His Christ after the strength of war, He may protect them at the last with the immortality of peace.
People; (hoz lamu) instead of which the Hebrew has lamo, "their strength "though the people of God had not been mentioned. St. Jerome translates, "the Lord is my strength. "Houbigant shows that the Vulgate is most accurate. (Berthier)
Protestants' marginal note, "his strength. "
Salvation. Literally, "salvations "as he had many times protected David, as well as (Haydock) the priests and prophets, and all the chosen people, 1 Peter ii. 9. (Calmet)
God causeth the good endeavours of the king for his subjects to prosper. (Worthington)