Deuteronomy 34:5

So Moses - died - according to the word of the Lord - על פי יהוה al pi Yehovah, at the mouth of Jehovah; i. e., by the especial command and authority of the Lord; but it is possible that what is here said refers only to the sentence of his exclusion from the promised land, when he offended at the waters of Meribah.

According to the word of the Lord - It denotes that Moses died, not because his vital powers were exhausted, but by the sentence of God, and as a punishment for his sin. Compare Deuteronomy 32:51.

34:5 So Moses the servant of the Lord died - He is called the servant of the Lord, not only as a good man, (all such are his servants) but as a man eminently useful, who had served God's counsels in bringing Israel out of Egypt, and leading them thro' the wilderness. And it was more his honour, to be the servant of the Lord, than to be king in Jeshurun. Yet he dies. Neither his piety nor his usefulness would exempt him from the stroke of death. God's servants must die, that they may rest from their labours, receive their recompense, and make room for others. But when they go hence, they go to serve him better, to serve him day and night in his temple. The Jews say, God sucked his soul out of his body with a kiss. No doubt he died in the embraces of his love.