Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai-kubra:3505 – ʿAlī b. Ḥujr > Sharīk > Abū Isḥāq > ʿĀmir > Jarīr

"Any slave who runs away from his masters and joins the enemy, he has made it permissible to shed his blood." (Using translation from Nasāʾī 4056)  

الكبرى للنسائي:٣٥٠٥ – أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ قَالَ حَدَّثَنَا شَرِيكٌ عَنْ أَبِي إِسْحَاقَ عَنْ عَامِرٍ عَنْ جَرِيرٍ قَالَ

«أَيُّمَا عَبْدٍ أَبَقَ مِنْ مَوَالِيهِ وَلَحِقَ بِالْعَدُوِّ فَقَدْ أَحَلّ بِنَفْسِهِ»  

See similar narrations below:

Collected by Nasāʾī
nasai:4056 – ʿAlī b. Ḥujr > Sharīk > Abū Isḥāq > ʿĀmir > Jarīr

"Any slave who runs away from his masters and joins the enemy, he has made it permissible to shed his blood."  

النسائي:٤٠٥٦ – أَخْبَرَنَا عَلِيُّ بْنُ حُجْرٍ قَالَ حَدَّثَنَا شَرِيكٌ عَنْ أَبِي إِسْحَاقَ عَنْ عَامِرٍ عَنْ جَرِيرٍ قَالَ

أَيُّمَا عَبْدٍ أَبَقَ مِنْ مَوَالِيهِ وَلَحِقَ بِالْعَدُوِّ فَقَدْ أَحَلَّ بِنَفْسِهِ