‘Amr ibn al-‘As reported: The Prophet, peace and blessings be upon him, sent for me and he ordered me to put on my armor and weapons, then come to him. I did so and came to him while he was performing ablution. The Prophet raised his eyes to me, then lowered them and he said, “O ‘Amr, I intend to send you at the head of an army and Allah will award you with spoils. I will give you an appropriate portion of the property.” ‘Amr said, “I did not embrace Islam in hopes of earning spoils, but rather I submitted in hopes of Islam and to be with the Messenger of Allah.” The Prophet said, “O ‘Amr, lawful wealth is excellent for a righteous man.”
Source: al-Adab al-Mufrad 297
Grade: Sahih (authentic) according to Al-Albani
عن عَمْرو بْن الْعَاصِ قَالَ بَعَثَ إِلَيَّ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَأَمَرَنِي أَنْ آخُذَ عَلَيَّ ثِيَابِي وَسِلاحِي ثُمَّ آتِيهِ فَفَعَلْتُ فَأَتَيْتُهُ وَهُوَ يَتَوَضَّأُ فَصَعَّدَ إِلَيَّ الْبَصَرَ ثُمَّ طَأْطَأَ ثُمَّ قَالَ يَا عَمْرُو إِنِّي أُرِيدُ أَنْ أَبْعَثَكَ عَلَى جَيْشٍ فَيُغْنِمُكَ اللَّهُ وَأَرْغَبُ لَكَ رَغْبَةً مِنَ الْمَالِ صَالِحَةً قُلْتُ إِنِّي لَمْ أُسْلِمْ رَغْبَةً فِي الْمَالِ إِنَّمَا أَسْلَمْتُ رَغْبَةً فِي الإِسْلامِ فَأَكُونُ مَعَ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فَقَالَ يَا عَمْرُو نِعْمَ الْمَالُ الصَّالِحِ لِلْمَرْءِ الصَّالِحِ
297 الأدب المفرد للبخاري باب المال الصالح للمرء الصالح
229 المحدث الألباني خلاصة حكم المحدث صحيح في صحيح الأدب المفرد