"An infidel spy came to the Prophet ﷺ while he was on a journey. The spy sat with the companions of the Prophet ﷺ and started talking and then went away. The Prophet ﷺ said (to his companions), 'Chase and kill him.' So, I killed him." The Prophet ﷺ then gave him the belongings of the killed spy (in addition to his share of the war booty).  

أَتَى النَّبِيَّ ﷺ عَيْنٌ مِنَ الْمُشْرِكِينَ وَهْوَ فِي سَفَرٍ فَجَلَسَ عِنْدَ أَصْحَابِهِ يَتَحَدَّثُ ثُمَّ انْفَتَلَ فَقَالَ النَّبِيُّ ﷺ اطْلُبُوهُ وَاقْتُلُوهُ فَقَتَلَهُ فَنَفَّلَهُ سَلَبَهُ