Sahih Muslim | Book 20 | Hadith Number 4712

Narrated by It has been narrated on the authority of Uqba b. Amir who
It has been narrated on the authority of Uqba b. Amir who said: I heard the Messenger of Allah (may peace be upon him) say: Lands shall be thrown open to you and Allah will suffice you (against your enemies), but none of you should give up playing with his arrows.