SB 9.15.31

yato yato ’sau praharat-paraśvadho
 mano-’nilaujāḥ para-cakra-sūdanaḥ
tatas tataś chinna-bhujoru-kandharā
 nipetur urvyāṁ hata-sūta-vāhanāḥ
Synonyms: 
yataḥ — wherever; yataḥ — wherever; asau — Lord Paraśurāma; praharat — slashing; paraśvadhaḥ — being expert in using his weapon, the paraśu, or chopper; manaḥ — like the mind; anila — like the wind; ojāḥ — being forceful; para-cakra — of the enemies’ military strength; sūdanaḥ — killer; tataḥ — there; tataḥ — and there; chinna — scattered and cut off; bhuja — arms; ūru — legs; kandharāḥ — shoulders; nipetuḥ — fell down; urvyām — on the ground; hata — killed; sūta — chariot drivers; vāhanāḥ — carrier horses and elephants.
Translation: 
Lord Paraśurāma, being expert in killing the military strength of the enemy, worked with the speed of the mind and the wind, slicing his enemies with his chopper [paraśu]. Wherever he went, the enemies fell, their legs, arms and shoulders being severed, their chariot drivers killed, and their carriers, the elephants and horses, all annihilated.
Purport: 

In the beginning, when the army of the enemy was full of fighting soldiers, elephants and horses, Lord Paraśurāma proceeded into their midst at the speed of mind to kill them. When somewhat tired, he slowed down to the speed of wind and continued to kill the enemies vigorously. The speed of mind is greater than the speed of the wind.