Adam Clarke on Jeremiah 29:32

I will punish Shemaiah -

1. He shall have no posterity to succeed him.

2. His family, i.e., relations, etc., shall not be found among those whom I shall bring back from captivity.

3. Nor shall he himself see the good that I shall do for my people.

And all this shall come upon him and his because he hath taught rebellion against the Lord. He excited the people to reject Jeremiah, and to receive the lying words of the false prophets; and these led them to rebel.