QUOTE FROM BUKHARI, VOLUME 5, #369: Narrated Jabir Abdullah:
Allah's messenger said "Who is willing to kill Ka`b bin al-Ashraf who has hurt Allah and His apostle?" Thereupon Maslama got up saying, "O Allah's messenger! Would you like that I kill him?" The prophet said, "Yes". Maslama said, "Then allow me to say a (false) thing (i.e. to deceive Ka`b). The prophet said, "You may say it."
Volume 4, Book 52, Number 286: Narrated Salama bin Al-Akwa:
"An infidel spy came to the Prophet while he was on a journey. The spy sat with the companions of the Prophet and started talking and then went away. The Prophet said (to his companions), 'Chase and kill him.' So, I killed him." The Prophet then gave him the belongings of the killed spy (in addition to his share of the war booty).
Sunan Abu Dawud, Book 19, Number 2996: Narrated Muhayyisah:
The Apostle of Allah (peace_be_upon_him) said: If you gain a victory over the men of Jews, kill them. So Muhayyisah jumped over Shubaybah, a man of the Jewish merchants. He had close relations with them. He then killed him. At that time Huwayyisah (brother of Muhayyisah) had not embraced Islam. He was older than Muhayyisah. When he killed him, Huwayyisah beat him and said: O enemy of Allah, I swear by Allah, you have a good deal of fat in your belly from his property.
Hadith Malik 511:1588 The last statement that Muhammad made was: "O Lord, perish the Jews and Christians. They made churches of the graves of their prophets. There shall be no two faiths in Arabia."
Bukhari 5:59:362 The Prophet killed the men of the Jewish tribe Bani Quraiza (some 600 to 800 of them) and distributed their women, children and property among the Muslims All the other Jews of Medina were exiled.
Bukhari 5:59:365 The Prophet had the date-palms of the Jewish tribe of Bani-Al- Nadir burnt and cut down. "It was with Allah’s permission" (Qur’an 59:5)
Bukhari 5:59:447 The Prophet said to Sa'd, :The Bani Quraiza have agreed to accept your verdict" Sa’d said, "Kill all their men and take their women and children as slaves" The Prophet replied, "You have judged according to God's Judgment"