These four tiles are part of a longer frieze with an inscription written in Kufic script. It reads 'bism al]lah al-rahmān al-rahĪm la 'ilah illa huwa al 'azĪz al-hakĪm' ('[in the name of] God the most merciful, the most compassionate, there is no god but Him, the all-powerful, the all-ruling').
Pairs of long letter-stems are elaborately knotted together, and then continue upwards to the top of the tile to frame the lustre-painted decoration. Between the cobalt-blue letter stalks, spiralling leafy scrolls are painted in reserve white against brown lustre. This motif of placing a cobalt script in relief against lustre pattern was typical among the tile makers of Kashan since the thirteenth century.