The inscription comprises part of Qur'an XLVIII, sura al-fath, v.18.
A number of frieze tiles of similar decoration and size from various public and private collections are published in Pope (A Survey of Persian Art, Oxford, 1938, Vol. V, pl. 724-5). They each display a large band with a moulded inscription, very often in thuluth script, on a dense luster ground with a smaller register above equally moulded and lustre painted with foliage. They were originally displayed along the walls of palaces or pious foundations such as in the Mausoleum of 'Abd al-Samad in Natanz, of which the tile frieze is dated AH 707/1307-08 AD.
A square tile inscribed with verses of the Shahnama formerly in the Godman collection and now in the British Museum is of identical size and displays very similar decorative features (Arthur U. Pope, op. cit, pl. 725, A). The upper register is moulded with curving split palmettes encompassing a heart-shaped motif and the lustre painted ground shows similar birds on a foliage with identical rosettes with hatched pistils. Although the origin of the Godman tile is unknown, it is very likely that our tile comes from the same building.