Chalange for you

Hello Friends

There is a person X who is having lot of property and 2 sons A & B and he dont want to divide the property

so he will give 2horse to his children which is having same capacity in all aspect

he will tell to his children he will arrange a race and who ever come slow he will get the property

they began the race and one fellow come and tell to A & B something

they started the race more than 150 kmph

what did that stranger tell to A & B