A Fine Abbasid Pottery Bowl with Kufic Inscription, Iraq, 9th century,

the rounded earthenware body covered with an opaque white glaze, painted in blue with two Kufic lines to the centre and a row of stylised garlands along the rim, the exterior plain

Perpetual Glory, Medieval Islamic Ceramics From The Harvey B. Plotnick Collection, The Art Institute of Chicago, 2007.

O. Pancaroglu, Perpetual Glory, Medieval Islamic Ceramics From The Harvey B. Plotnick Collection, The Art Institute of Chicago, 2007, p.42, no.2.

In fairly good condition, once broken and restored with associated overpainting and some infill, some slight flaking to restored parts, as viewed.
"In response to your inquiry, we are pleased to provide you with a general report of the condition of the property described above. Since we are not professional conservators or restorers, we urge you to consult with a restorer or conservator of your choice who will be better able to provide a detailed, professional report. Prospective buyers should inspect each lot to satisfy themselves as to condition and must understand that any statement made by Sotheby's is merely a subjective, qualified opinion. Prospective buyers should also refer to any Important Notices regarding this sale, which are printed in the Sale Catalogue.
NOTWITHSTANDING THIS REPORT OR ANY DISCUSSIONS CONCERNING A LOT, ALL LOTS ARE OFFERED AND SOLD AS IS" IN ACCORDANCE WITH THE CONDITIONS OF BUSINESS PRINTED IN THE SALE CATALOGUE."

inscriptions
Possibly, twice:
‘abduhu
‘His (God’s) servant’