Psalm 78:2 New English Translation

²I will sing a song that imparts wisdom;
I will make insightful observations about the past.^[a]

Psalm 78:2 tn Heb “I will open with a wise saying my mouth, I will utter insightful sayings from long ago.” Elsewhere the Hebrew word pair חִידָה + מָשָׁל (mashal + khidah) refers to a taunt song (Hab 2:6), a parable (Ezek 17:2), proverbial sayings (Prov 1:6), and an insightful song that reflects on the mortality of humankind and the ultimate inability of riches to prevent death (Ps 49:4).

New English Translation (NET)