Sirach 28:10-12

New Revised Standard Version Catholic Edition

¹⁰ In proportion to the fuel, so will the fire burn,
    and in proportion to the obstinacy, so will strife increase;^[a]
in proportion to a person’s strength will be his anger,
    and in proportion to his wealth he will increase his wrath.
¹¹ A hasty quarrel kindles a fire,
    and a hasty dispute sheds blood.

¹² If you blow on a spark, it will glow;
    if you spit on it, it will be put out;
    yet both come out of your mouth.