Tafsir of Al-Adiyat 100:3

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. Then Allah says,

فٲثرن به نقعا