Kabbalah zu Schemuel II 2:38

But Abraham could not reach that grade and hold on to it until he entered the land of Yisrael, because that is where this level is achieved. It was similar with David, about whom it is written, "David inquired of Hashem, saying, Shall I go up to any of the cities of Yehuda? And Hashem said to him, 'Go up.' And David said, Where shall I go up? And Hashem said, 'to Hevron'" (II Shmuel 2:1). Since Saul had died, and David was fit to receive the kingship, why then did he not receive the kingship over Yisrael immediately?