Why did he say "Lo Chen Beisi Im Kel"?
Rashi: Hashem did not make my morning cloudy. 1 Radak - my house is always light!
Targum Yonasan: My house gets more [than the reward of other Tzadikim]
Malbim: I.e. my kingship will not cease.
What Bris Olam is arranged in all and guarded?
Rashi #1: It is the Torah that Hashem gave to me. It is arranged in all my house and guarded.
Rashi #2: Hashem made a Bris that my kingship will be permanent 1 ; this is arranged in the mouth of all Nevi'im (all say so).
Malbim: Once my kingship is established, it will be arranged with all strength and beauty.
Targum Yonasan: Just like the arrangement of the creation persists, and it is guarded for the world to come.
What is all David's Yisha and Chefetz?
Rashi: The verse is abbreviated. It means that my needs are prepared in front of Hashem.
Targum Yonasan: You give to me all my needs and requests from You. Radak - it is not like herbage that [lacks the water it needs, and] dries up.
Malbim: Yisha is the desires of the soul; Chefetz is worldly desires.
What will not sprout?
Rashi: Another king will not sprout after my kingship.
Targum Yonasan: Any kingship that opposes mine will not endure.