In Musnad Al-Bazzar, it is recorded from Abu At-Tufayl `Amir bin Wathilah from Zayd bin Harithah that the Messenger of Allah said to Ibn Sayyad:

«إِنِّي قَدْ خَبَأْتُ خَبْأً فَمَا هُوَ؟»

(I am concealing something, what is it) And the Messenger of Allah was concealing Surat Ad-Dukhan from him. He (Ibn Sayyad) said: "It is Ad-Dukh.'' The Messenger of Allah said,

«اخْسَأْ مَا شَاءَ اللهُ (كَانَ)»

(Be off with you! Whatever Allah wills happens.)