Psalms 63:11

But the king shall rejoice in God -This passage, as was remarked in the Introduction to the psalm, shows that this psalm could not have been composed in the time of Saul, since the title king was not then given to David. The use of the term here in the third person does not prove that the psalm could not have been written by David himself, for he may have spoken of himself simply as “the king,” and all the more forcibly and properly as he was driven unjustly from his throne, and was now an exile, yet was still a king - the king. The title was his; the throne belonged to him, and not to Absalom who had driven him from it.