הַֽלְלוּ־יָ֡הּ הַלְלִ֥י נַ֝פְשִׁ֗י אֶת־יְהוָֽה׃
Halleluja. Rühme meine Seele den Herrn!
Radak
אהללה ה' בחיי. "I will praise the Lord while I live.": Seeing in the Holy Spirit the ingathering of exiles, he spoke on behalf of Israel, saying, "Hallelujah," and likewise to his own soul, "Praise the Lord with them and without them."
Ibn Ezra
"Praise be to God"- [These are] the words of the poet to Israel, and afterwards he says it to himself.
Radak
אהללה ה'. "Praise the lord": Now, while I am still alive, I will praise Him and sing to Him and proclaim Him in public. And he said to them: