Psalm 150 begins with the phrase “praise Yahweh,” another way of saying alleluia, the Hebrew “Hallelujah.” Yahweh is to be praised both in his sanctuary and in the mighty heavens. He is to be praised for his deeds and his greatness.
Psalm 145 is an acrostic or Hebrew alphabet praise psalm of David about the God of Israel. David would extol God as his king. He would bless his name forever. Every day he blessed and praised his name. Yahweh was great with an unsearchable greatness. The first 3 letters of the Hebrew alphabet are found here in italic.