YOU SAID:

I went up to him and I said "You don't have a leg to stand on"

INTO JAPANESE

私は彼のところに行き、「あなたには立つ足がない」と言いました

BACK INTO ENGLISH

I went to him and said, "You have no legs to stand on."

INTO JAPANESE

私は彼のところに行き、「あなたには立つ足がない」と言いました。

BACK INTO ENGLISH

I went to him and said, "You have no legs to stand on."