...who got it from Samuel Pain. Follow the chronology:
Mr. Pain posts this on the 20th of May:
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A few days later, a Polish paper publishes it in their rumours section, as a question:
https://sport.fakt.pl/pilka-nozna/b...w-premier-league-chce-ich-southampton/815lkb7
It then gets picked up by Southampton FC Updates:
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Another Polish journalist then says (translated) that:
https://www.meczyki.pl/newsy/transf...ej-kierunek-premier-league-nasz-news/189433-n
"There are more and more indications that one of them will be Mateusz Lis, who in the nearest window will be the hero of one of the most surprising transfers, if we are talking about players from Poland."
Again, with no indication of source.
Is it possible that it's true? Sure. Is there anything in that chain where any individual actually suggests that they have a credible source, rather than this being a nonsense rumour that got laundered until it was "a lot of people are saying!"? No.