Musnad Ahmad 780:1

Muhammad ibn Ja'far narrated to us, Shu'bah narrated to us, from Ya'la ibn 'Ata, from 'Umarah ibn Hadid al-Bajali, from Sakhr al-Ghamidi, from the Prophet, peace and blessings of Allah be upon him, who said: "O Allah, bless my nation in their early mornings." He said: Whenever the Messenger of Allah, peace and blessings of Allah be upon him, would send out a military detachment, he would send it at the beginning of the day. Sakhr was a merchant, and he would not send out his servants except at the beginning of the day, so his wealth increased until he did not know where to place his wealth.