Yonus bin Yazid bin Abi al-Nijad يونس بن يزيد بن أبي النجاد · The Book of Jihad

"There are three, all of whom have a promise of help from Allah: 'The Mujahid who strives in the cause of Allah, the Mighty and Sublime; the man who gets married, seeking to keep himself chaste; and the slave who has a contract of manumission and wants to buy his freedom.'"

"O Ka'b! Tell us a Hadith from the Messenger of Allah (ﷺ) and be careful." He said: "I heard him say: 'Whoever develops one gray hair in Islam, in the cause of Allah, it will be light for him on the Day of Resurrection.'" He said to him: "Tell us about the Prophet (ﷺ) and be careful." He said: "I heard him say: 'Shoot, and whoever hits the enemy with an arrow, Allah will raise him one degree in status…

"I heard the Messenger of Allah (ﷺ) say: 'Bring me the weak, for you only receive provision and Divine support by virtue of your weak ones.'"