The number 7000 symbolizes a complete and faithful remnant that God preserves for Himself, as well as divine perfection on a grand scale.

In 1 Kings 19:18 God declares that he has kept 7,000 in Israel who have not bowed the knee to Ba'al, making the number a powerful symbol of the faithful remnant. Paul quotes this in Romans 11:4 to show that God always preserves an elect remnant by grace. The number is built on the holy number 7 (which symbolizes divine perfection and completeness) multiplied by 1,000 (which represents a large, complete multitude), thus expressing God's sovereign and complete care for his people.