CC Madhya 14.51

matta-hasti-gaṇa ṭāne yāra yata bala
eka pada nā cale ratha, ha-ila acala
Word for word: 
matta-hasti-gaṇa — the strong elephants; ṭāne — started pulling; yāra yata bala — with whatever strength they had; eka pada — a single step; nā cale — does not move; ratha — the car; ha-ila — was; acala — still.
Translation: 
The strong elephants pulled with all their strength, but still the car remained at a standstill, not budging an inch.