Genesis 27:18

And he came unto his father
Into the tent and apartment where he was: and said, my father;
to try whether he was awake, and to let him know that he was come, since he could not see him: and he said, here [am] I;
what hast thou to say to me? who [art] thou, my son?
for, from the voice and the quick dispatch made, he suspected it was not his son Esau.