Hadithcore
Sahih al-Bukhari, 3162
sahih

Narrated Juwairiya bin Qudama at-Tamimi:

We said to `Umar bin Al-Khattab, Jo Chief of the believers! Advise us." He said, "I advise you to fulfill Allah's Convention (made with the Dhimmis) as it is the convention of your Prophet (ﷺ) and the source of the livelihood of your dependents (i.e. the taxes from the Dhimmis.) "

حَدَّثَنَا آدَمُ بْنُ أَبِي إِيَاسٍ، حَدَّثَنَا شُعْبَةُ، حَدَّثَنَا أَبُو جَمْرَةَ، قَالَ سَمِعْتُ جُوَيْرِيَةَ بْنَ قُدَامَةَ التَّمِيمِيَّ، قَالَ سَمِعْتُ عُمَرَ بْنَ الْخَطَّابِ ـ رضى الله عنه ـ قُلْنَا أَوْصِنَا يَا أَمِيرَ الْمُؤْمِنِينَ‏.‏ قَالَ أُوصِيكُمْ بِذِمَّةِ اللَّهِ، فَإِنَّهُ ذِمَّةُ نَبِيِّكُمْ، وَرِزْقُ عِيَالِكُمْ‏.‏

References2 variants
In-Book Reference
Book 58, Hadith 5
USC-MSA web (English) reference
Vol. 4, Book 53, Hadith 388 (deprecated numbering scheme)