Charles Ellicott Commentary 1 Chronicles 29:10

"Wherefore David blessed Jehovah before all the assembly; and David said, Blessed be thou, O Jehovah, the God of Israel our father, for ever and ever." — 1 Chronicles 29:10 (ASV)

Wherefore. — And. This refers to David’s Prayer (1 Chronicles 29:10–19). David thanks God because his people are in unity with him on the subject closest to his heart. Regarding this fine utterance of true inspiration, which the chronicler—or rather, perhaps, his source—attributes to the aged king, we may observe that the spirit that found expression in the stirring odes of psalmists and the trumpet-tones of prophets in former times, in later days, when psalmody was weak and prophecy had ceased, flowed out in the new channel of impassioned prayer.

Before all. — To the eyes of all (Genesis 23:11), and frequently.

Lord God of Israel our father. — The connection is “Israel our father,” not “Jehovah our father.” (Compare 1 Chronicles 29:18; 1 Chronicles 29:20; Exodus 3:6. Yet compare also Isaiah 63:16; Isaiah 64:8; Deuteronomy 32:6; Malachi 1:6; Malachi 2:10; Jeremiah 31:9.) The fatherhood of God, though thus occasionally affirmed in prophetic writings, hardly became a ruling idea within Old Testament times. (Matthew 6:9.)

For ever and ever. — From eternity even to eternity. (Compare the doxologies of the first and third books of the Psalter—Psalms 41:13; Psalms 106:48—and Psalms 103:17.)