I believe it was the weapon refered to as the "shlang"
Explanation:
The shlang was the first weapon Alexander encountered as it was when he first arrived in India when he found Jil Nehoundon who introduced him to the collection of rocks/balls made of stone and dirt. These balls sometimes contained scrap metal and were thrown. On impact these balls caused very harmful infections as they were often soaked in goat urine and or pig feciece.
This resulted in the name "shlang" as they were thrown/slang using leather belts (lang) and had scrap metal (-sh)
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