No, that's not correct. Einstein won the Nobel Prize, but not specifically for his work on relativity.

Einstein was awarded the Nobel Prize in Physics in 1921, but the prize citation was "for his services to Theoretical Physics, and especially for his discovery of the law of the photoelectric effect." 

His groundbreaking work on the theory of relativity, both the special and general theories, was not explicitly mentioned in the Nobel Prize award. This is sometimes attributed to the fact that the theory of relativity was still controversial and not yet fully accepted at the time.

So in summary, while Einstein's work on relativity is considered his most famous and significant scientific achievement, it was not directly cited as the reason for his Nobel Prize win. The prize recognized his work on the photoelectric effect instead.
