Aisha رضي الله عنها said:

Know that if somebody tells you one of the following three things, he is a liar:

Whoever tells you that Muhammad ﷺ saw his Lord, is a liar." 

Then Aisha رضي الله عنها recited the Verse: 'No vision can grasp Him, but His grasp is over all vision. He is the Most Courteous Well-Acquainted with all things.' (6.103) 

'It is not fitting for a human being that Allah should speak to him except by inspiration or from behind a veil.' (42.51)

 `Aisha رضي الله عنها further said,

"And whoever tells you that the Prophet ﷺ knows what is going to happen tomorrow, is a liar."

She then recited: 'No soul can know what it will earn tomorrow.' (31.34)

 She رضي الله عنها added: "And whoever tell you that he concealed (some of Allah's orders), is a liar." Then she recited: 'O Apostle! Proclaim (the Message) which has been sent down to you from your Lord..' (5.67) `Aisha رضي الله عنها added. "But the Prophet ﷺ saw Gabriel in his true form twice."

Sahih al-Bukhari 4855, Sahih Muslim 177 

• Aisha said,

"If anyone tells you that Muhammad has seen his Lord, he is a liar, for Allah says: 'No vision can grasp Him.'  & if anyone tells you that Muhammad has seen the Unseen, he is a liar, for Allah says: "None has the knowledge of the Unseen but Allah

Reference: Sahih Bukhari 7380

In-book reference: Book 97, Hadith 10