Now it came to pass, when Jeremiah had made an end of speaking all that the LORD had commanded him to speak unto all the people, that the priests and the prophets and all the people took him, saying, Thou shalt surely die.
The priests. The captain (or prefect) of the temple had the power of apprehending offenders in the temple, with the sanction of the priests.
The prophets - the false prophets. The charge against Jeremiah was that of uttering falsehood in Yahweh's name, an act punishable with death (Deuteronomy 18:20). His prophecy against the temple and city (Jeremiah 26:11) might speciously be represented as contradicting God's own words (Psalms 132:14). Compare the similar charge against Stephen (Acts 6:13-14).