question #2 Sahih Muslim 762e, Book 13, Hadith 284 : How did the companions of the Prophet (ﷺ) determine the night of Lailat-ul-Qadr?

By Allah, I know well about it. Shu’ba said: To the best of my knowledge it was the twenty-seventh night for which the Messenger of Allah (ﷺ) commanded us to stand for prayer. Shu’ba doubted these words: That it was the night for which the Messenger of Allah (ﷺ) commanded us to stand for prayer. And (he further) said: This was narrated to me by a friend of mine from him (the Holy Prophet).