VaggaUppattikathā

Abhidhammapiṭaka · Kathāvatthu · Vol. 37 · Section 880

[880] [S.] Was the Elder (thera) Sāriputta not an Arahant (arahā) simultaneously with rebirth (upapatti)? [P.] Yes. [S.] If the Elder Sāriputta was not an Arahant simultaneously with rebirth, then indeed, good sir, it should not be said: "One is an Arahant simultaneously with rebirth."

English translation from the Pali (Siam Raṭṭha edition) — under review, not for citation.