Alma 40:5

Now whether there shall be one time, or a second time, or a third time, that men shall come forth from the dead, it mattereth not; for God knoweth all these things; and it sufficeth me to know that this is the case; that there is a time appointed that all shall rise from the dead.

There might be one time when people come back from the dead. Or there might be a second time or a third time. It does not matter. God knows all these things. It is enough for me to know that there is a set time when all people will rise from the dead.

Whether people come back from the dead once, twice, or three times doesn’t matter. God knows all these things. It’s enough for me to know this: there is a time appointed when everyone will rise from the dead.