Alma 1:24

for the hearts of many were hardened, and their names were blotted out, that they were remembered no more among the people of God. And also many withdrew themselves from among them.

Many people’s hearts became hard. Their names were erased. They were no longer remembered among God’s people. Many also left the church.

Many people’s hearts hardened. Their names were erased from the church records, forgotten among God’s people. Others simply left.