John Gill Commentary 1 Chronicles 3:1

"Now these were the sons of David, that were born unto him in Hebron: the first-born, Amnon, of Ahinoam the Jezreelitess; the second, Daniel, of Abigail the Carmelitess;" — 1 Chronicles 3:1 (ASV)

Ver. 1-4 Now these were the sons of David
The six following 1 Chronicles 3:2

(See Gill on 1 Chronicles 3:1).