The phrase "to do the saving" means to put money aside or store it for the future, to save money instead of spending it. It can also refer to saving something from harm or danger.
Sentences with «to do the saving»
Not only do you save money on gas, you save wear and tear on your vehicle. (autoinsuresavings.org)
Not only do I save money by making some of my own each week, they taste better and my house smells superb all the time. (bakednewengland.com)
How do you save money for emergencies when you're barely paying your living expenses week to week? (complexsearch.com)