Abu Sa'id Al-Khudri (May Allah be pleased with him) reported:
Messenger of Allah ﷺ said, "How can I feel at ease when the Angel of the Trumpet, (Israfil) has put his lips to the Trumpet and is waiting for the order to blow it". He ﷺ perceived as if this had shocked his Companions, so he ﷺ told them to seek comfort through reciting: 'Hasbunallah wa ni'mal-Wakil [Allah (Alone) is Sufficient for us, and He is the Best Disposer of affairs (for us)]".

[At-Tirmidhi].

وعن أبي سعدي الخدرى، رضي الله عنه، قال: قال رسول الله، ﷺ "كيف أنعم وصاحب القرن قد التقم ، واستمع الإذن متى يؤمر بالنفخ فينفخ" فكأن ذلك ثقل على أصحاب رسول الله ، ﷺ فقال لهم:"قولوا :حسبنا الله ونعم الوكيل" ((رواه الترمذي وقال حديث حسن)).