'Embittered' in the Bible

And Hushai said, “You know your father and his men, that they are brave men, and they are enraged and fierce, like a bear deprived of her cubs in the field. Your father is a [shrewd] man of war, and will not spend the night with the people [knowing that you seek his life].

“As God lives, who has taken away my right and denied me justice,And the Almighty, who has caused bitterness and grief for my soul,

When my heart was embitteredAnd I was pierced within [as with the fang of an adder],

but the unbelieving Jews [who rejected Jesus as Messiah] stirred up and embittered the minds of the Gentiles against the believers.

while it is said,“Today [while there is still opportunity] if you hear His voice,Do not harden your heart, as when they provoked Me [in the rebellion in the desert at Meribah].”

So I took the little book from the angel’s hand and ate it, and in my mouth it was as sweet as honey; but once I had swallowed it, my stomach was bitter.