Yeremia 9:14

9:14 Instead they have followed the stubborn inclinations of their own hearts. They have paid allegiance to ¹  the gods called Baal, ²  as their fathers ³  taught them to do.

Yeremia 31:30

31:30 Rather, each person will die for his own sins. The teeth of the person who eats the sour grapes will themselves grow numb. ⁴ 

[9:14]  ¹ tn Heb “they have gone/followed after.” See the translator’s note at 2:5 for the idiom.

[9:14]  ² tn Heb “the Baals,” referring either to the pagan gods called “Baals” or the images of Baal (so NLT).

[9:14]  ³ tn Or “forefathers,” or “ancestors.” Here the referent could be the immediate parents or, by their example, more distant ancestors.

[31:30]  ⁴ sn The Lord answers their charge by stating that each person is responsible for his own sin and will himself bear the consequences. Ezek 18 has a more extended treatment of this and shows that this extends not just to the link between parents and children but between former behavior and future behavior of the same individual. To a certain extent the principle articulated here is anticipatory of the statement in v. 34 which refers to the forgiveness of former sins.