Sayyiduna Ibn Abbas (may Allah be pleased with them both) said concerning this statement of Allah Almighty: "Then when the Trumpet is blown" [Al-Muddaththir: 8]: The Messenger of Allah (peace and blessings be upon him) said: "How can I be at ease when the one with the Horn has already put the Horn to his mouth?" And he (peace and blessings be upon him) bowed his forehead (and said): "He is listening intently for when he will be commanded." The Companions said: Then what should we say? He (peace and blessings be upon him) said: "Say: Allah is sufficient for us, and He is the best Disposer of affairs."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 12617