Cannot find the original source for sure,but i found a possible one on knowyourmeme here: https://knowyourmeme.com/photos/1869476-sonic-the-hedgehog

I found a DeviantART user: (oiix0xiio) that seems to match, tho i could not find this art itself on their page, but the username seems to be the same as the one on the image, and the art style seems to match as well

As well, both the knowyourmeme user and the DeviantART user have at least one image in common, so if the knowyourmeme user is not the original artist, they may have been reposting from the DA artist