Abba (Ba) bar Zabdai () was a Palestinian amora who flourished in the third century. He studied in Mesopotamia, attending the lectures of Abba Arikha and Rav Huna, and subsequently settled at Tiberias, where he occupied a respected position by the side of Rabbi Ammi and Assi. Mention is made of his custom of saying his prayers in a loud voice (Jerusalem Talmud, Berachot iv.7a). Of his haggadic productions there exists, among others, a sermon for a public fast-day, on Lamentations iii.41 (Yer. Ta'anit, ii.65a), from which the following may be quoted:
<blockquote>Though he may have sinned, he is still an Israelite!</blockquote>
<blockquote>The myrtle that stands amongst the reeds is still a myrtle.</blockquote>