1 Samuel 18:8

And Saul was very wroth, his jealousy immediately flared up, and the saying displeased him; and he said, They have ascribed unto David ten thousands and to me they have ascribed but thousands; and what can he have more but the kingdom? All that was missing in David's case was the royal dignity and position, this being a presentiment which may almost have amounted to a suspicion, since Samuel had distinctly stated that the royal power would pass into another family.