Dhammapada 1 [Khuddaka Nikaya]

I- Yamakavagga, The Pairs
1- Cakkhupalatthera Vatthu

Manopubbangama dhamma, manosettha manomaya;
manasa ce padutthena, bhasati va karoti va;
tato nam dukkhamanveti, cakkamva vahato padam.

All mental phenomena have mind as their forerunner; they have mind as their chief; they are mind-made. If one speaks or acts with an evil mind, 'dukkha' follows him just as the wheel follows the hoofprint of the ox that draws the cart.

Reference:  
Mya Tin, Daw, tr. The Dhammapada: Verses and Stories. Rangoon: Burma Tipitaka Association, 1986.  

Posted by Nyan U