an impure garment when no other is available, but he must repeat the prayer.

It is unlawful for males—though not for females—to wear a fabric woven with or plated¹ in gold or silver, or to wear clothing that is wholly or predominantly silk.

Permissible, however, is a cloth whose warp is silk while its weft is another material, or one in which the silk and the non-silk threads are equally apparent on the outside.

Seventh: keeping free of impurity, as far as one can, one’s body,² clothing, and place of prayer.³ If a person is confined in a filthy spot and performs the prayer, it is valid; but because of the wet impurity he should gesture for the prostration as best he can and sit on the balls of his feet.

If his garment merely touches an impure garment, or a wall he is not leaning on, or he prays on a clean spot whose edge is defiled, or some impurity falls on him and then falls off or is removed immediately, the prayer is valid.

The prayer is invalid, however, if he is unable to remove the impurity at once, or if he forgets about it and later remembers.⁴

A prayer is not valid on usurped land, nor⁵ in a cemetery, a slaughterhouse, a rubbish dump, a latrine, the watering places of camels, the middle of the roadway, a bathhouse, or on rooftops.