Imam Al-Nawawi’s Riyad-us-Saliheen
The Desirability of setting on a Journey on Thursday in the Early part of the
956. Ka`b bin Malik (May Allah be pleased with him) reported: The Prophet (sallallaahu alayhi wa sallam) set out on Thursday for the expedition of Tabuk. He liked to set out on a journey on Thursdays.
[Al-Bukhari and Muslim]
957. Sakhr bin Wada`ah Al-Ghamidi (May Allah be pleased with him) reported: The Messenger of Allah (sallallaahu alayhi wa sallam) said, “O Allah! Bless my people in the early part of the day (morning). Whenever he dispatched a detachment or an army-unit, he would dispatch it at the beginning of the day (soon after dawn). The narrator, Sakhr (May Allah be pleased with him) was a merchant, and he used to send off his merchandise at the beginning of the day. So his trade flourished and he made a good fortune.
[At-Tirmidhi and Abu Dawud].