@aamizone, if you have an image saved, and you don't remember where it came from (or if it is a Google Image [not good for a source]) you can use a 'reverse image search' to find sources.
I just gave you the link to "TinEye reverse search" which I find superior to the google reverse image search.
I have Literally thousands of images saved, most of which I never use any more because it is too much trouble to reverse search when you can go to
pixabay or Pexels or Unsplash all of which have high quality free to use, Copyright free images.
But you should still give the source for the images you use from those places. Like this

source