All Israel will be saved (Romans 11:26).
We can believe that all of Israel will be saved because God’s Word says it will happen. We know that God always keeps His promises, so we can rest assured that what He says will happen will happen.
The prophet Daniel took God at His Word.
In the first year of his reign, I, Daniel, understood from the Scriptures, according to the word of the Lord given to Jeremiah the prophet, that the desolation of Jerusalem would last seventy years.
Daniel 9:2
Daniel understood by the Word of the Lord that the desolation of Jerusalem would last 70 years, and many scholars agree that about the time Daniel makes this discovery, it had been nearly 70 years.
Daniel does something with his understanding from the scriptures. In verse three we find:
Then I turned my face to the Lord God, seeking him by prayer and pleas for mercy with fasting and sackcloth and ashes.
Daniel 9:3
Daniel understood that the desolation of Jerusalem would last 70 years, so when he realized that time was about up, he decided to pray, fast, and seek the Lord.
He prayed to the Lord because he understood that it was His will for the captivity to cease.
The prophet Elijah also took God at His Word.
Now Elijah the Tishbite, of Tishbe in Gilead, said to Ahab, “As the Lord, the God of Israel, lives, before whom I stand, there shall be neither dew nor rain these years, except by my word.”
…
After many days the word of the Lord came to Elijah, in the third year, saying, “Go, show yourself to Ahab, and I will send rain upon the earth.”
1 Kings 17:1, 18:1
Elijah delivered a message to Ahab, king of Israel, that it would not rain on the earth for about three years. And once that period of time had ended, he delivered a second message that the Lord would send rain on the land. Elijah believed what God said and he delivered the messages.
But he didn’t only believe and obey. He did something else, too:
Elijah was a man with a nature like ours, and he prayed fervently that it might not rain, and for three years and six months it did not rain on the earth. Then he prayed again, and heaven gave rain, and the earth bore its fruit.
James 5:17-18
We see that two of God’s prophets, Daniel and Elijah, praying because they understood that it was God’s will to accomplish something. They not only prayed, but they prayed earnestly.
We can understand from the scriptures that it is God’s will that the whole house of Israel be saved.
And in this way all Israel will be saved, as it is written,
“The Deliverer will come from Zion,
he will banish ungodliness from Jacob”;
“and this will be my covenant with them
when I take away their sins.”
Romans 11:26-27
We should pray earnestly for the salvation of Israel. God’s Word indicates that it is the will of God, and Paul the apostle also himself prayed:
Brethren, my heart’s desire and prayer to God for Israel is, that they might be saved.
Romans 10:1 KJV
Let us pray earnestly for the salvation of Israel, because we understand from the scriptures that all of Israel will be saved.