Qur'an 100:3

And scouring to the raid at dawn,

Then those that make raids at morn,

Sa´an nan mãsu yin hari a lokacin asuba.

(By the snorting coursesﾅ) [100:1-11]. Muqatil said: ﾓThe Messenger of Allah, Allah bless him and give him peace, sent a military expedition to a clan of Banu Kinanah and appointed al-Mundhir ibn Amr al-Ansari as its leader. When their news was late to come, the hypocrites said: They have all been killedﾒ, and so Allah, exalted is He, gave news about this expedition and revealed (By the snorting courses) meaning the horses of that expeditionﾔ. Abd al-Ghafir ibn Muhammad al-Farisi informed us> Ahmad ibn Muhammad al-Basti> Muhammad ibn Makki> Ishaq ibn Ibrahim> Ahmad ibn Abdah> Hafs ibn Jami> Simak> Ikrimah> Ibn Abbas who related that the Messenger of Allah, Allah bless him and give him peace, sent a cavalry in a mission but did not receive any news from them a month after they had left. And so it was revealed (By the snorting courses) i.e. the horses snorting with their nostrils.

فَالْمُغِيرَاتِ صُبْحًا ﴿٣﴾ And scouring to the raid at dawn. meaning, the raid that is carried out in the early morning time. This is just as the Messenger of Allah used to perform raids in the early morning. He would wait to see if he heard the Adhan (call to prayer) from the people. If he heard it he would leave them alone, and if he didn't hear it he would attack.