Al-Hasan used to give legal verdict on the authority of this tradition.
Abu Dawud said: This will be so in the sunset prayer. The imam will offer six rak'ahs and the people three rak'ahs.
Abu Dawud said: Yahya b. Abi Kathir narrated from Abu Salamah from Jabir from the Prophet (ﷺ) something similar. Sulaiman al-Yashkuri reported it from the Prophet (ﷺ) in like manner.
In-book : Book 4, Hadith 51
English translation : Book 4, Hadith 1243