The 144,000

 

Response to comment [from a Christian]: [The 144,000] "Who are they and why only 144,000?"

 

144,000 Billy Graham's

See:

Who Are the 144,000? Revelation 7 Grace to You
 

"What about the Great Multitude that no man can number?"

 

People who will be saved during the Tribulation:

 

7:9 a great multitude. While the tribulation period will be a time of judgment, it will also be a time of unprecedented redemption (cf. v. 14; 6:9–11; 20:4; Is. 11:10; Matt. 24:14). all nations, tribes, peoples, and tongues.
MacArthur, John Jr: The MacArthur Study Bible. electronic ed. Nashville : Word Pub., 1997, c1997, S. Re 7:9

 

The 144,000