Pentecost Season · Proper 15 · Year A
Psalm 133
When Brothers Dwell in Unity
August 16, 2026

Overview & Insights
“Behold, how good and pleasant it is when brothers dwell in unity!” (Psalm 133:1)
This celebration of fellowship and unity, as the NIV’s exclamation point rightly implies, is a joyful surprise and not to be taken for granted. In two similes, it is compared to things that “come down” (the NIV’s running down and falling both translate the same Hb. participle, yōrēd ), namely oil and dew. This thrice repeated Hebrew participle may be inviting us to look heavenward for its origin, especially in the image of dew. The same implication of divine origin also resides in the image of oil. This is no ordinary oil, it is that which is on the head, running down on Aaron’s beard. This reference is reminiscent of Aaron’s anointing—performed by pouring oil on his head—whereby he was consecrated as Israel’s high priest (Exod. 29:7; 30:22–33; Lev. 8:12). Divine origin is finally made explicit for “the” blessing, which the LORD bestows.
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Commentary
Working Preacher: Commentary on Psalm 133 Working Preacher
Lutheran lectionary commentary on the psalm of unity for the complementary track.
Enduring Word: Psalm 133 Enduring Word · David Guzik
David Guzik's verse-by-verse evangelical notes on the song of ascents on unity.
BibleHub: Commentaries on Psalm 133:1 BibleHub
Parallel classic commentaries on the goodness of kindred dwelling in unity.
Background & Word Study
Questions preachers ask
What is Psalm 133?
A short song of ascents praising the blessing of unity among God's people, like precious oil on Aaron's head or the dew of Hermon, where the Lord commands the blessing of life forever.
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