'This is not but the word of man'.
"This is human made."
It is nothing but the word of a mortal!
This is naught but the word of a mortal
That truly that (is) except the human's word/opinion and belief
Then he said: “These words are not from the Lord; they are fabricated by a human being”
“This is nothing but the speech of a man.”
`This is nothing but the word of a man
This (Qur’an) is nothing (else) but the words of a human being.
`This is nothing but mere words of a human being.
"This is nothing but the word of a human being!"