OK, it took me a while to read it, but once I worked out the mint, it narrowed things down. The mint is Tashkent (which in Arabic is esh-Shash), in what is now Uzbekistan. It is not 'Abbasid, but the rather more obscure Samanid dynasty which ruled in central Asia from 819 to 1000 AD. The date on your coin is hard to read - it's weakly struck right where the crucial words are - but I think it's AH 286, which would translate nicely to 899 AD. The Samanid ruler at the time was
Isma'il ibn Ahmad. This
example on Zeno.ru is more or less identical to your coin as far as mint and date are concerned.
Don't say "infinitely" when you mean "very"; otherwise, you'll have no word left when you want to talk about something really infinite. - C. S. Lewis