The following quip is often attributed to the physicist Richard Feynman:
If all of mathematics disappeared, physics would be set back by exactly one week.
But did Feynman actually say this? None of the above websites gives a source. It sounds like something Feynman might have said. He did say other provocative things about mathematics, such as, "I bet there isn't a single theorem that you can tell me what the assumptions are and what the theorem is in terms I can understand where I can't tell you right away whether it's true or false." But I haven't been able to locate a source for the above quotation.
As an aside, my interpretation of the quip is that physicists are highly capable of reinventing whatever mathematics they need for the physics they are working on. So if they encounter some new situation in which unfamiliar mathematics is needed, then they have two options. They can either check the mathematics literature to see if the relevant mathematics has already been developed by mathematicians, or they can roll up their sleeves and reinvent the requisite mathematics themselves. The quip suggests that the latter approach will take at most one week longer than the former approach. I mention this interpretation because it might help search for the source of this quotation, or at least something similar to it.