Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) said: "How can I remain happy and at ease, while the one with the horn (trumpet) has certainly taken the horn in his mouth and is attentively listening, waiting for the command to blow, so he will blow it." It seemed this was hard on the companions of Muhammad (peace and blessings be upon him), so at that time he (peace and blessings be upon him) said to them: "Say: 'Allah is sufficient for us and He is the best disposer of affairs, upon Allah alone we have placed our trust.'"