The criteria of choosing a King - Messiah had been fulfilled:
God chose the Messiah King (both with Saul & David) however, the prophet must anoint and acknowledge him before the people. Basing this information on the
Laws Concerning
King Mashiach. The prophet isn’t the one who picks out the Messiah, the prophets are the ones who can recognize & acknowledge them before the Sanhedrin & the people. After reading the anointing by the prophet and acknowledging Saul & David as the Messiah (Melech HaMoshiach) does it seem like either of them are ordinary persons or one that has God’s seal on him. David was not only acknowledged as King but also a savior. Not all Jewish kings have been anointed and also, only monarchs who are descended from the patriarch Jacob’s son Judah through his descendants Kings David and Solomon. Anointing reinforces the covenant that the descendants would continue the dynasty.
The other point being made (added) King Messiah also promotes justice:
In Micah 6:6-8 said, "With what shall I come before the LORD and bow down before the exalted God? Shall I come before him with burnt offerings, with calves a year old? 7** Will the LORD be pleased with thousands of rams, with ten thousand rivers of olive oil? Shall I offer my firstborn for my transgression, the fruit of my body for the sin of my soul?
8 He has shown you, O mortal, what is good. And what does the LORD require of you? To act justly and to love mercy and to walk humbly with your God.**
The Messiah (
Melech haMashiach as ‘King Messiah’) in the Book of Samuel, two possible functions are described - judgment and military leadership. For obedience is better than sacrifices: and to hearken rather than to offer the fat of rams. 1 Samuel 15:22 What happened with Saul? And, isn’t the verse in 1 Samuel when choosing another King the main point, “the Lord has sought out a man after his own heart.” 1 Samuel 13:14
WITH SAUL:
**15 Now the day before Saul came, the Lord had revealed this to Samuel: 16 “About this time tomorrow I will send you a man from the land of Benjamin. Anoint him ruler over my people Israel; he will deliver them from the hand of the Philistines. I have looked on my people, for their cry has reached me.” 1 Samuel 9:15-16
"But, you stay here for a while, so that I may give you a message from God.”
1 SAMUEL 10: THE ANNOINTING
then Samuel took a flask of olive oil and poured it on Saul’s head and kissed him, saying, “Has not the Lord anointed you ruler over his inheritance?[
a] 2 When you leave me today, you will meet two men near Rachel’s tomb, at Zelzah on the border of Benjamin. They will say to you, ‘The donkeys you set out to look for have been found.
9 As Saul turned to leave Samuel, God changed Saul’s heart, and all these signs were fulfilled that day.
11 When all those who had formerly known him saw him prophesying with the prophets, they asked each other, “What is this that has happened to the son of Kish? Is Saul also among the prophets?”