Jamieson, Fausset and Brown on Psalms 78:1

PSALM 78

Psa 78:1-72. This Psalm appears to have been occasioned by the removal of the sanctuary from Shiloh in the tribe of Ephraim to Zion in the tribe of Judah, and the coincident transfer of pre-eminence in Israel from the former to the latter tribe, as clearly evinced by David's settlement as the head of the Church and nation. Though this was the execution of God's purpose, the writer here shows that it also proceeded from the divine judgment on Ephraim, under whose leadership the people had manifested the same sinful and rebellious character which had distinguished their ancestors in Egypt.

1. my people ... my law--the language of a religious teacher (Psa 78:2; La 3:14; Ro 2:16, 27; compare Psa 49:4). The history which follows was a "dark saying," or riddle, if left unexplained, and its right apprehension required wisdom and attention.