Hebrews 4:11

11 Let us, therefore, make every effort to enter that rest, so that no one will perish by following their example of disobedience.

Read Hebrews 4:11 Using Other Translations

Let us labour therefore to enter into that rest, lest any man fall after the same example of unbelief.
Let us therefore strive to enter that rest, so that no one may fall by the same sort of disobedience.
So let us do our best to enter that rest. But if we disobey God, as the people of Israel did, we will fall.