John Trapp on Jeremiah 4:18

Ver. 18. Thy wayes and thy doings have procured theſe things unto thee] This is like as we uſe to ſay to our children when they have taken cold or got any harm, This is your gadding and dabbling in the dirt, your going in the ſnow, your eating of fruit, &c.

This is thy wickedneſſe] i. e. Merces malitiae, the wages of thy wickedneſſe, the fruit of thy folly.

Becauſe it is bitter] Thou haſt given God a bitter pill, as it were, that went to his heart: and now he hath given thee as bitter a potion, that reacheth unto thine heart.