BITTERNESS IS LINKED WITH REBELLION

Exodus 12:8 And they shall eat the flesh in that night … with bitter <04844> herbs they shall eat it.

Exodus 15:23 And when they came to Marah, they could not drink of the waters of Marah, for they were bitter: therefore the name of it was called Marah.

Jeremiah 4:16 Make ye mention to the nations; behold, publish against Jerusalem, that watchers come from a far country, and give out their voice against the cities of Judah.

Jeremiah 4:17 … because she hath been rebellious <04784> against me, saith the LORD.