Narrated Simak ibn Harb: 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.
Hadith Takhrij« تفرد بہ أبو داود، (تحفة الأشراف: 15703) (ضعیف) » (اس کی سند میں دو مبہم راوی ہیں)
Explanation & Benefits
Shaykh Umar Farooq Saeedi
Benefits and Issues: ➊ It is recommended (mustahabb) to arrange for a flag in jihad.
➋ In the earliest generations, there was no specific color or size for flags. And the narration regarding the yellow color is weak.
➌ Undoubtedly, it is desirable to keep the flag raised and prominent during battle and on other important occasions. However, all of this is for the sake of organization. To assign to it a sense of sanctity and reverence, as has become common nowadays, is un-Islamic, and in fact borders on shirk (associating partners with Allah).
Source: Sunan Abu Dawood – Commentary by Shaykh Umar Farooq Saeedi, Page: 2593