Aniconism in Judaism covers a number of areas. The portrayal of God in any kind of human or concrete form is strictly prohibited. Hebrew Bible A number of verses in the Hebrew Bible (Tanakh) refer to prohibitions against the creation of various forms of images, invariably linked directly with idolatry. The strongest source is based on what Judaism counts as the second of the Ten Commandments: Leviticus 26:1 reads: Similar injunctions appear in Numbers 33:52, Deuteronomy 4:16, and 27:15; in all cases, the creation of the image is associated with idolatry, and indeed, the words commonly translated as 'image' or some variant thereof ( , ) are generally used interchangeably with words typically translated as 'idol' (e.g. ). (An important exception is , used in such verses as Genesis 1:26: "let us make man in our image", where this word for 'image' was not associated with idols.) Based on these prohibitions, the Hebrew prophets, such as Isaiah, Jeremiah, Amos, and others, preached very strongly against idolatry. In many of their sermons, as recorded in the biblical books bearing their names, the prophets regarded the use of religious images as a negative sign of assimilation into the surrounding pagan cultures of the time. Lenient Torah commentators permit drawing of humans as long as the images are not used for idolatry. Halakha Despite the semantic association with idols, halakha (Jewish law) as taught by the Shulkhan Aruch interprets the verses as prohibiting the creation of certain types of graven images of people, angels, or astronomical bodies, whether or not they are actually used as idols. The Shulkhan Aruch states: "It is forbidden to make complete solid or raised images of people or angels, or any images of heavenly bodies except for purposes of study". ("Heavenly bodies" are included here because the stars and planets were worshipped by some religions in human forms. Astronomical models for scientific purposes are permitted under the category of "study.") A breakdown can be found in the Shulkhan Aruch, section Yoreh De'ah, which takes the literal meaning of as "graven image" (from the root , 'to engrave'.) The prohibition is therefore seen as applying specifically to certain forms of sculpture and depictions of the human face. In keeping with this prohibition, some illustrations from the Middle Ages feature fantastic creatures—usually animal-headed humanoids, even when the depictions are quite clearly meant to be those of historical or mythological humans.