The hadith of Mu'awiyah ibn al-Hakam al-Sulami (may Allah be pleased with him) and his story with the slave girl whom the Prophet (peace and blessings be upon him) asked: (Where is Allah?)

The Shaykh : ... meaning, be silent; this is not the time for talking. He said: When the Messenger of Allah (peace and blessings be upon him) finished the prayer, he turned to me. Imagine with me the psychological state of this man, and imagine if such an incident happened in the last times; a man spoke such words in prayer and the imam came to him; what would you think he would do to him? He would likely say to him: "O ignorant one, O one who does not understand, O such and such," and so on. Perhaps this man imagined something of that sort, but he was completely surprised by the opposite.
He said: When the Messenger of Allah (peace and blessings be upon him) finished the prayer, he turned to me; and by Allah, he did not humiliate me, nor did he overpower me, nor did he hit me, nor did he curse me, but he only said to me: . He said: I said: O Messenger of Allah. He began asking the Messenger; we imagine that this Mu'awiyah ibn al-Hakam al-Sulami, when he saw the Prophetic gentleness and that he did not rebuke him for his ignorance and his speech in prayer, except that he taught him, said to him: "This action you performed is not permissible in prayer." Now, a door of gentleness opened before him, and before him was the master of mankind, full of knowledge; so I must learn. He began asking him question after question, asking naturally because he felt the need to know the answer. He said: O Messenger of Allah, among us are people who visit fortune-tellers. He said: . He said: O Messenger of Allah, among us are people who take omens. He said: . He said: O Messenger of Allah, among us are people who draw lines—sand drawing. He (peace be upon him) said: . This is called by the scholars "hanging on the impossible." The Prophet said in the answer that there was a prophet among the prophets whose miracle was that he could know some of the unseen through the sand, from Allah; so whoever matches his drawing with his, that is it. Meaning, who can match this except a prophet, and that one is a prophet; it is called "hanging on the impossible."
. He said: O Messenger of Allah—and here is the point—I have a slave girl who tends my sheep in al-Hudaybiyah. One day, a wolf raided my sheep, and I am a human being who gets angry as humans do, so I struck her a blow, and I am obligated to free a slave. He said: . So he brought her, and he (peace and blessings be upon him) said: . She said: In the sky. He said to her: . She said: You are the Messenger of Allah. He said to her master: . The Prophet (peace be upon him) testified for this slave girl who tended sheep on Mount al-Hudaybiyah that she was a believer; because she knew Allah by His supreme attribute that He is in the sky, and she knew that Muhammad is the Messenger of Allah.
Today, ask the people of knowledge: Where is Allah? You naturally do not know what the answer is. What is this question? This question is not permissible, and the Prophet is the one who taught us this question, and the answer is in the Noble Qur'an as the slave girl said, . She said: In the sky. , do you see that the slave girl today is more knowledgeable than our scholars, except for those whom Allah wills!! And few are they, and indeed in that is a reminder for one who has a heart or who lends an ear while being a witness.