3033 — Mahmud ibn Khalid narrated to us, ‘Umar — meaning Ibn ‘Abd al-Wahid — narrated to us, who said: Sa‘id — meaning Ibn ‘Abd al-‘Aziz — said: The Arabian Peninsula is from the valley (al-Wadi) to the farthest extent of Yemen, to the borders of Iraq, to the sea.(1)

3034 — Abu Dawud said: It was read to al-Harith ibn Miskin — and I was present — [who said]: Ashhab ibn ‘Abd al-‘Aziz informed you, saying: Malik said: ‘Umar expelled the people of Najran, but did not expel [the Jews] of Tayma’, because it is not among the lands of the Arabs. As for the valley (al-Wadi), I think that the Jews who were there were not expelled only because they did not consider it part of the land of the Arabs.(2)

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(1) Its chain is authentic up to Sa‘id ibn ‘Abd al-‘Aziz — who is al-Tanukhi al-Dimashqi — and he is an imam whom Imam Ahmad equated with al-Awza‘i.
Al-Bayhaqi also transmitted it in 9/208 via the chain of Abu Dawud.
His saying “the valley” means Wadi al-Qura.
His saying “tukhūm” means boundaries and landmarks, with fatḥa or ḍamma on the tā’, singular takham. Al-Mundhiri said this in “Mukhtasar al-Sunan.”
There are multiple opinions regarding the delimitation of the Arabian Peninsula, which al-Mundhiri related in “Mukhtasar al-Sunan.”

(2) Its narrators are trustworthy, but it is mursal, because Malik did not meet ‘Umar ibn al-Khattab.
Al-Bayhaqi also transmitted it in 9/209 via the chain of Abu Dawud.
‘Umar’s expulsion of the people of Najran was also narrated by Ibn Abi Shayba in his “Musannaf” 14/550 from Yahya ibn Sa‘id al-Ansari, and by Ibn Abi Shayba 14/550–551, and by al-Fakihi in “Akhbar Makkah” (2919) from Salim ibn Abi al-Ja‘d, and by al-Bayhaqi in “al-Sunan al-Kubra” 6/135 from ‘Umar ibn ‘Abd al-‘Aziz ibn Marwan — and although these are mursal reports, their narrators are trustworthy, and collectively they establish this as authentic from ‘Umar ibn al-Khattab.
However, ‘Umar ibn ‘Abd al-‘Aziz mentioned in his narration that ‘Umar ibn al-Khattab also expelled the people of Tayma’, contrary to Malik in his narration here, while agreeing with him regarding the expulsion of the people of Najran and Fadak.