IMHO it's somewhat dubious that this attested in Old Prussian - most Old Prussian literature is Christian, and reports about the Old Prussian were for example in Latin (Johannes Maeletius/Meletius/Maletius).
Rainer Eckert, Zum Analytismus in den baltischen Sprachen, p. 399, in: 2004, Eurolinguistische Arbeiten: Die europäischen Sprachen auf dem Wege zum analytischen Sprachtyp. Herausgegeben von Uwe Hinrichs unter Mitarbeit von Uwe Büttner, Wiesbaden, p. 399ff.:
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