‏الجهاد والسير‏ : Hadeeth No:4313 It has been narrated on the authority of Abu Huraira that the Messenger of Allaah (sallAllaahu alayhi wa sallam) said: Do not desire an encounter with the enemy; but when you encounter them, be firm....

‏الزهد والرقائق‏ : Hadeeth No:7119 Abu Sufyan reported like that as as-Saduq al-Amin al-Walid b. Harb narrated with the same chain of transmitters....