'Former Prophets' in the Bible

Be ye not as your fathers, unto whom the former prophets cried, saying, Thus saith Jehovah of hosts, Return ye now from your evil ways, and from your evil doings: but they did not hear, nor hearken unto me, saith Jehovah.

Should ye not hear the words which Jehovah cried by the former prophets, when Jerusalem was inhabited and in prosperity, and the cities thereof round about her, and the South and the lowland were inhabited?

Yea, they made their hearts as an adamant stone, lest they should hear the law, and the words which Jehovah of hosts had sent by his Spirit by the former prophets: therefore there came great wrath from Jehovah of hosts.