Weak. It is documented in al-Ahādīth al-Daīfah (1235).

459—(The Messenger of Allah (peace and blessings be upon him) sent Abd Allah ibn Rawāhah to the Jews to assess the land tax they owed on their date palms. They offered him some money, but he told them: “As for the bribe you have offered, it is unlawful gain, and we do not consume it.” Narrated by Mālik.) p. 321.

Mālik narrated it in al-Muwatta (2/703/2), from Ibn Shihāb, from Sulaymān ibn Yasār:

“The Messenger of Allah (peace and blessings be upon him) used to send Abd Allah ibn Rawāhah to Khaybar to assess the yield to be divided between him and the Jews of Khaybar. He said: They gathered some of their women’s jewelry for him and said, ‘This is yours; reduce what we owe and be lenient toward us in the division!’ Abd Allah ibn Rawāhah replied, ‘O assembly of Jews! By Allah, you are among the people of Allah’s creation whom I detest most, but that will not cause me to treat you unjustly. As for what you have offered...’” And he added: “They said, ‘It is upon such justice that the heavens and earth are upheld.’”

I say: This is a sound chain of transmission, though it is mursal. Mālik then narrated a similar report in abbreviated form from Ibn Shihāb, from Saīd ibn al-Musayyib, also as a mursal report, but without mentioning the offer of money to Ibn Rawāhah or his words, “O assembly of Jews!” Abū Dāwūd (3413) and Ahmad (6/163) supplied it with a connected chain through Ibn Jurayj, who said: “I was informed from Ibn Shihāb, from Urwah, from Āishah, who said: ‘The Prophet (peace and blessings be upon him) used to send Abd Allah ibn Rawāhah...’” The remainder of the hadith is similar, apart from what we have mentioned. Its narrators are among those used by al-Bukhārī and Muslim, except that there is a break in the chain between Ibn Jurayj and Ibn Shihāb. Muhammad ibn Sālih al-Tammār differed from him, narrating from al-Zuhrī, from Saīd ibn al-Musayyib, from Attāb ibn Asīd that the Prophet (peace and blessings be upon him) used to appoint someone over the people to assess the yield of their vineyards and fruit crops. Ibn Mājah (1819) narrated it. However, this al-Tammār is truthful but makes mistakes.