ENOfficial
‘Umar said, “I held an administrative post in the time of God's Messenger, and he gave me payment for it." Abu Dawud transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: عَمِلْتُ عَلَى عَهْدِ رَسُولِ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فعملني. رَوَاهُ أَبُو دَاوُد
sunnah.com