Hadith #2593 (Sunan Abi Dawud)
Book: Jihad (Kitab Al-Jihad)
Narrator(s): al-Walid bin Muslim al-Quraishi الوليد بن مسلم القرشي, Jubayr bin Nufayr al-Hadrami, Mu'ml bin al-Fadl مؤمل بن الفضل, Zayd bin Artah زيد بن أرطاة
Grade: Da'if

Simak reported on the authority of a man from his people, on the authority of another man from them: I saw that the standard of the Messenger of Allah (ﷺ) was yellow.

Source: https://parallelquran.com/hadith/sunan-abi-dawud-2593/

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Hadith #4296 (Sunan Abi Dawud)
Book: Battles (Kitab Al-Malahim)
Narrator(s): Abu al-Darda, Hisham bin 'Ammar bin Nasayr هشام بن عمار بن نصير, Jubayr bin Nufayr al-Hadrami, Yahya bin Hamza bin Waqd يحيى بن حمزة بن واقد, Zayd bin Artah زيد بن أرطاة
Grade: Da'if

The Prophet (ﷺ) said: The time between the great war and the conquest of the city (Constantinople) will be six years, and the Dajjal (Antichrist) will come forth in the seventh.
Abu Dawud said: This is sounder than the tradition narrated by Isa (bin Yunus)

Source: https://parallelquran.com/hadith/sunan-abi-dawud-4296/