Tafsir of Qaf 50:20

And the Trumpet will be blown -- that will be the Day of the threat. Earlier we discussed the information about the blowing of the Trumpet, the fear that follows it, the death of everything and then resurrection, all this will occur on the Day of Resurrection. We also mentioned that the Messenger of Allah said in a Hadith,

كيف أنعم وصاحب القرن قد التقم القرن وحنى جبهته وانتظر أن يوذن له

How can I feel comfort while the angel responsible for the Trumpet has placed the Trumpet to his mouth and lowered his forehead awaiting when he will be commanded (by Allah to blow in it). They said, "O Allah's Messenger, what should we say?'' He said,

قولوا

حسبنا الله ونعم الوكيل

Say, "Allah is sufficient for us, and He is the best disposer of affairs.'' The Companions repeated this invocation, saying, "Allah is sufficient for us, and He is the best disposer of affairs (for us).'' Allah said,

وجاءت كل نفس معها سايق وشهيد