Those words

 Have meaning 

The keepers of the gates

 Aren't just words 

Free

 Freedom 

David tended

 To the sheep as a child my most favorite person in the Bible 

I did not know

 That this chapter talks about King David 

Hey

 The porters and the singers are in the genealogy 

You be the judge

 

 

 

Cause of all the names

 I can't read that fast but OMG 

Chronicles

 Genealogy and ancestry