question #3 Sahih al-Bukhari 6172, Book 78, Hadith 198 : What can be learned from the Prophet’s response to Ibn Saiyad’s claim of knowledge?

Allah’s Messenger (ﷺ) said to Ibn Saiyad “I have hidden something for you in my mind; What is it?” He said,
“Ad-Dukh.” The Prophet (ﷺ) said, “Ikhsa.”