'King of Israel' in the Bible

“He saved others [from death]; He cannot save Himself. He is the King of Israel; let Him now come down from the cross, and we will believe in Him and acknowledge Him.

Let the Christ (the Messiah, the Anointed), the King of Israel, now come down from the cross, so that we may see and believe and trust [in Him]!” Those who were crucified with Him were also insulting Him.

Nathanael answered, “Rabbi (Teacher), You are the Son of God; You are the King of Israel.”

they took branches of palm trees [in homage to Him as King] and went out to meet Him, and they began shouting and kept shouting “Hosanna! Blessed (celebrated, praised) is He who comes in the name of the Lord, even the King of Israel!”