Albert Barnes Commentary Psalms 136:5

"To him that by understanding made the heavens; For his lovingkindness [endureth] for ever:" — Psalms 136:5 (ASV)

To Him who by wisdom made the heavens – He made them in so wise a manner, where so much wisdom was manifested. See Proverbs 3:19; Proverbs 8:24–31.

For His mercy... – The making of the heavens was a manifestation of mercy and goodness, as furnishing an abode for unfallen and holy beings; as a dwelling-place for redeemed sinners when they shall be removed there from the earth; and as, by their order, their beauty, their harmony, and their beneficial influences, tending to promote the happiness of humanity on earth.