" Muhammad b. Maslamah went back and remained for three days, neither eating nor drinking more than would keep him alive. The Messenger of God got to hear of this, so he summoned him and said to him, "Why have you left off food and drink?""O Messenger of God," he said, "I said something, and I do not know whether or not I can fulfill it."
"All that you are obliged to do is try," he replied.
"O Messenger of God," he said, we shall have to tell lies."
"Say hat you like," he replied. "You are absolved in the matter."
Then Muhammad b. Maslamah, Silkan b. Salamah b. Waqsh, otherwise known as Abu Na’ilah, and the foster brother of Ka'b, 'Abbad b. Bishr b. Waqsh…..made a plan to kill him.
Before they all went to Ibn al-Ashraf, they sent ahead Silkan b. Salamah Abu Na’ilah and they spoke together for a while, and recited verses to one another…...
It was a moonlit night, and they went all forward until they reached Ka'b’s stronghold. Then Abu Na’ilah called out to him.
He had recently married, but he leaped up in his blanket. His wife took hold of one end of it, and said, "You are a fighting man; a man of war does not leave his house at an hour like this."
He replied, "It is Abu Na’ilah. If he had found me sleeping, he would not have wakened me." "By God," she said, "I sense evil in his voice!"
Then Ka'b said to her, "Even if a brave man is summoned to a sword thrust, he responds."
He went down his room and spoke with them for a while, and they spoke with him. Then they said to him, "Would you like to walk with us, Ibn al-Ashraf, to Shi'b al- 'Ajuz, so that we can talk there for the rest of the night?"
"If you like," he said. So they set out together and walked for a while.
Then Abu Na’ilah thrust his hand into the hair of his temple, smelled, and said, "I have never known perfume to smell so good as it does tonight."
Then he walked on for a while, and did the same thing again, so that Ka'b relaxed his guard. Then he walked on for a while, and did it again, taking hold of the hair of both temples. Then he said, "Strike the enemy of God!"
Their swords rained blows upon him, but to no avail.
Muhammad b. Maslamah said later, "When I saw that our swords were of no avail, I remembered a long, thin dagger which I had in my scabbard, and took hold of it. By this time the enemy of God had shouted so loudly that lamps had been lit in all the strongholds around us.
I plunged the dagger into his breast and pressed upon it so heavily that it reached his pubic region, and the enemy of God fell.
Al-Harith b. Aws b. Mu'adh had been wounded in the head or the leg, struck by one of our swords. We left, passing through the quarters of the Banu Umayyah b. Zayd and the Banu Qurayzah….Al-Harith b. Aws was lagging behind us, bleeding heavily, so we waited for him for a while, and then he came to us, having folLowed in our footsteps.
We lifted him up and carried him to the Messenger of God at the end of the night. He was standing in prayer, so we greeted him, and he came out to meet us. We told him that the enemy of God had been killed, he spat upon the wound of our companion, and we returned to our families.
The next morning, the Jews were in a state of fear on account of our attack upon the enemy of God, and there was not a Jew there but feared for his life.
The Messenger of God said, "Whoever of the Jews falls into your hands, kill him."
So Muhayyisah b. Mas'ud fell upon Ibn Sunaynah, one of the Jewish merchants who was on close terms with them and used to trade with them, and killed him.
Huwayyisah b. Mas'ud (his brother) at that time had not yet accepted Islam,- he was older than Muhayyisah, and when (the latter) killed (the Jew), he began beating him and saying, "Damn you, have you killed him? By God, you have much fat in your belly from his wealth."
Muhayyisah said, "I said to him, 'By God, if he who commanded me to kill him had commanded me to kill you, I would have cut off your head.' "
And, by God, that was the beginning of Huwayyisah's acceptance of Islam. He said, "If Muhammad had ordered you to kill me, you would have killed me?" and I replied, "Yes, by God, if he had ordered me to kill you I would have cut off your head." "By God," he said, "a religion which has brought you to this is indeed a marvel."
It is the least that you can say. What is shocking in this sad news item is that we were not at war.
Because it goes without saying that deceiving the enemy during a war is a matter of common sense, but such dissimulation nevertheless raises a whole series of ethical dilemmas. According to Abu'Abdullah al-qurtubi and Muhyid ibn al-Arabi, Muslims are therefore entitled to behave like infidels and even worse - for example by prostrating themselves before idols or crosses and by adoring them,