John Calvin on Jeremiah 40:8

They then and their men, came to Gedaliah, when they heard that the king of Babylon had set Gedaliah, the son of Ahikam, over Judea, and that men, women, and children were committed to his power or keeping. And then he adds, from the poverty of the land, that is, from the dregs of the people, even from those who had not been removed to Babylon: they came, even Ishmael, etc.; who, as we shall hereafter see, became a traitor. He was, as the Prophet says, of the royal family. His spirits were still very high, and influenced by envy, he killed Gedaliah, though he had been kindly received by him. He had, at the same time, received a reward for his treachery from the king of Amon. But all these things we shall see in what follows.

He names here the fugitive chiefs, the first of whom was Ishmael, and among them were the sons of Kareah; who had pledged their faith to Gedaliah; but he was too credulous, and, at the same time, closed his ears to wise counsels and warnings. The Prophet proceeds to tell us how Geda-liah dealt with his own nation, —

Jeremiah 40:9-10

9. And Gedaliah the son of Ahikam the son of Shaphan sware unto them and to their men, saying, Fear not to serve the Chaldeans: dwell in the land, and serve the king of Babylon, and it shall be well with you.

9. Et juravit illis Godolias filius Achikam et viris eorum, dicendo, Ne metuatis a serviendo (hoc est, ne metuatis servire, ne impediat vos timor quo minus serviatis Chaldaeis;) sed subjicite vos et servite regi Babylonis; et bene erit vobis.

10. As for me, behold, I will dwell at Mizpah to serve the Chaldeans, which will come unto us: but ye, gather ye wine, and summer-fruits, and oil, and put them in your vessels, and dwell in your cities that ye have taken.

10. Et ego, ecce ego manebo in Mispath, ut stem coram facie Chaldaeorum (hoc est, ut occurram Chaldaeis) qui venient ad nos; et vos colligite vinum et fructus aestivos (קיף significat oestatem, sed transfertur metaphorice ad oestivos fructus,) et oleum; et reponite in vasis vestris, et habitate in urbibus quas apprehenderitis.