Yosef Karo, Translation:Shulchan Aruch — Orach Chaim 448…
“ Paragraph 2 - If a non-Jew brings a present of hametz to a Jew on the last day of Passover, the Jew should not accept it, and he also should not make it apparent through his actions that he wants it. It is good for him to say that he does not want to acquire it. ”
