If one says, "Allah knows that I was in such-and-such a place," and he is lying, does he owe an expiation?

Question:
May Allah reward you, Honorable Shaykh. This questioner says: If one says, "Allah knows that I was in such-and-such a place," but he lied, what is required of him?

Answer:
No harm, Allah knows (Glorified and Exalted is He). As for him being a liar, saying, "Allah knows that I was in such-and-such a place," when he was not there, he is a liar, but Allah knows that he is a liar; there is nothing on him.