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.
bayhaqi:20329Abū al-Ḥusayn b. Bishrān > Abū ʿAmr b. al-Sammāk > Ḥanbal b. Isḥāq > al-Ḥumaydī > Sufyān > ʿAbd al-Malik > ʿUmar Katab > Saʿd b. Abū Waqqāṣ

[Machine] Consult Tulaicha and Amr bin Ma'di Karib about your war strategy, and do not disregard any of their opinions, for each craftsman knows his own craft best.  

البيهقي:٢٠٣٢٩أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ بِشْرَانَ أنبأ أَبُو عَمْرِو بْنُ السَّمَّاكِ ثنا حَنْبَلُ بْنُ إِسْحَاقَ ثنا الْحُمَيْدِيُّ ثنا سُفْيَانُ ثنا عَبْدُ الْمَلِكِ أَنَّ عُمَرَ كَتَبَ إِلَى سَعْدِ بْنِ أَبِي وَقَّاصٍ ؓ

أَنْ شَاوِرْ طُلَيْحَةَ وَعَمْرَو بْنَ مَعْدِي كَرِبَ فِي أَمْرِ حَرْبِكَ وَلَا تُوَلِّهِمَا مِنَ الْأَمْرِ شَيْئًا فَإِنَّ كُلَّ صَانِعٍ هُوَ أَعْلَمُ بِصِنَاعَتِهِ