Romans 11:5-10

5 - God’s saved is a remnant of Jews from Paul’s day

6 - God saves by His grace, not man’s works

7 - God saves by election of grace whereas seeking by works fails to save

8-10 - Paul explains Israel’s unbelief and rejection of God

8 - Moses - Deuteronomy 29:2-6
8 - Isaiah - Isaiah 29:10-13
9-10 - David - Psalm 69:22

Further study of the reasons for Israel’s unbelief:
Isaiah 6:9-10
John 8:43
Acts 28:26
2 Corinthians 13:14-15
Ephesians 4:18
Ezekiel 12:2
I Samuel 6:16
Psalm 81:11-12
2 Kings 17:14
Romans 1:28