Proverbs 4:23

4:23 Guard your heart with all vigilance,

for from it are the sources of life.

Isaiah 57:20

57:20 But the wicked are like a surging sea

that is unable to be quiet;

its waves toss up mud and sand.

James 3:10-12

3:10 From the same mouth come blessing and cursing. These things should not be so, my brothers and sisters. 3:11 A spring does not pour out fresh water and bitter water from the same opening, does it? 3:12 Can a fig tree produce olives, my brothers and sisters, or a vine produce figs? Neither can a salt water spring produce fresh water.