Jāmiʿ al-Ruwāt
p. 551علي بن أبي العلاء بن سيابة (ق. جخ) و فيه نظر وتقدم عن (صه) و (ق) العلاء بن المسيب
Ali ibn Abi al-'Ala' ibn Sinaba (referenced in Qummi's Rijal and Kashshi's Rijal). There is a doubt/observation in this. It was mentioned previously that (in al-Saduq and Qummi) he is al-'Ala' ibn al-Musayyab.