yoma 37

the glare of publicity

the gold tablet so that the Torah shouldn't have to come out to shame the Sotah - who will be publicly shamed.
but everyone likes a disco-ball morning alarm

(described are 2 items of gold in the temple donated by the same woman. the first is a light fixing that when the morning light would hit it will radiate out letting all know it is time for the shema, and a gold tablet on which the passage of the Sotah is written on it, so that a sefer torah won't have to be brought out for such a shameful ritual...)