Psalm 108

It took me only 5 minutes to read, and ponder briefly, David's words. The words that struck me strongest were in verse 12; "human help is worthless.". How many times during the reign of the kings od Judah did they forget these words of their forefather?
After reading this psalm I wondered if this were one of the songs he sang for king Saul before David began leading Israel's army?
Stuart