Shmuel Alef 17:40

And he took his makel (stick, staff) in his yad, and chose him chamishah chalukei avanim (five smooth stones) out of the nachal (brook), and put them in a keli haro'im (shepherdʼs bag) which he had, even in a wayfarerʼs bag; and his kela (slingshot) was in his yad; and he drew near to the Pelishti.