Where does “указаться” come from?
указаться (Russian) comes from Russian указа́ть, from Russian каза́ть, from Proto-Slavic kāzàti, from Proto-Indo-European kʷeǵ-, from Proto-Indo-European kʷeḱ- — to see; to look.
указаться (Russian): passive of указа́ть
Ancestry of “указаться”, step by step