Hadith #2944 (Sunan Abi Dawud)
Book: Tribute, Spoils, and Rulership (Kitab Al-Kharaj, Wal-Fai' Wal-Imarah)
Narrator(s): Abdur Rahman bin 'Amr al-Awza'i عبد الرحمن بن عمرو أبو عمرو الأوزاعي, al-Mustward bin Shadad, Jubayr bin Nufayr al-Hadrami, Musa bin Mrwan موسى بن مروان
Grade: Sahih

‘Umar reported me to collect the sadaqah (i.e. zakat). When I became free, he ordered to give me payment for it. I said: I have worked for the sake of Allah. He said: Take what you have been given, for I held an administrative post in the time of the Messenger of Allah (ﷺ), and he gave me payment for it.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-2944/

------------------------------------------------------------

Hadith #4879 (Sunan Abi Dawud)
Book: General Behavior (Kitab Al-Adab)
Narrator(s): al-Mustward bin Shadad, Baqiyya bin al-Walid bin Sa'aid بقية بن الوليد بن صائد, Haywat bin Sharih bin Safwan حيوة بن شريح بن صفوان التجيبي, Makhul al-Shami/al-Damashiqi مكحول الشامي
Grade: Sahih

This tradition has also been transmitted by ‘Isa b. Abi ‘Isa al-sailahini from Abu al-Mughirah, as Ibn al-musaffa said.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-4879/