This hadith has been reported on the authority of Sulaiman bin Bilal (RA) with the same chain of transmitters and he is reported to have said: "The best condiment." And he did not doubt (about this word).
Commentary: (In the chain of narration, Abu Hamzah, Thabit bin Abi Safiyyah, is a weak narrator. However, by being strengthened through the hadith of Jabir radi Allahu anhu in Musnad Ahmad (3/353), this hadith is hasan li-ghayrihi (good due to corroborating evidence). Al-Silsilah al-Sahihah: 2220)
Source: Sunan al-Tirmidhi – Majlis ‘Ilmi Dar al-Da‘wah, New Delhi Edition, Page: 1841