Definition of "silverling"

As for those Samnites, and the men of Uz,That bought my Spanish oils and wines of Greece,Here have I purs'd their paltry silverlings.Fie, what a trouble 'tis to count this trash!

c. 1589–1590 (date written), Christopher Marlo[we], edited by Tho[mas] Heywood, The Famous Tragedy of the Rich Iew of Malta. […], London: […] I[ohn] B[eale] for Nicholas Vavasour, […], published 1633, Act I

And it shall come to pass in that day, that every place shall be, where there were a thousand vines at a thousand silverlings, it shall even be for briers and thorns.

1611, The Holy Bible, […] (King James Version), London: […] Robert Barker, […], Isaiah 7:23