Verses with the word seething in the Old Testament (3 verses):

1 Samuel 2:13
And the priest's custom with the people was, that, when any man offered sacrifice, the priest's servant came, while the flesh was in seething, with a fleshhook of three teeth in his hand;

Job 41:20
Out of his nostrils goeth smoke, as out of a seething pot or caldron.

Jeremiah 1:13
And the word of the LORD came unto me the second time, saying, What seest thou? And I said, I see a seething pot; and the face thereof is toward the north.