Psalm 90 is a powerful prayer to God, but also a moment of thanksgiving for God’s powerful work towards the people of Israel, that from generation to generation God continued to save the people of Israel with His strong hand.
Moses, God’s chosen man, to be able to take off and direct the people of Israel from that place where they were slaves for a long time, asked God to continue having mercy.
First of all, this man asks God to satisfy them with mercy. Why? Because there were always failures before God on the part of a people who did not understand what God was doing with them and the powerful works that He was doing.
13 Return, O Lord, how long? and let it repent thee concerning thy servants.
14 O satisfy us early with thy mercy; that we may rejoice and be glad all our days.
15 Make us glad according to the days wherein thou hast afflicted us, and the years wherein we have seen evil.
Psalm 90:13-15 (KJV)
Humiliated before God, he asked Him to turn to them, to look where they were, to fill them with mercy, that each morning His mercy could accompany them.
And he said that with praises and songs they would exalt the Lord, they would rejoice because the Lord has given them His infinite mercy, because there were times that God allowed the people to walk on a strange path so that they would learn that without their God they could not walk alone by all the desert.