whence
From LSJ
Πέτρος Ἰουδαίοις τάδε πρῶτα τεθέσπικε πιστοῖς → Peter has laid down the following first writing for the Jewish faithful
adv.
Interrogative: P. and V. πόθεν.
Indirect: P. and V. ὁπόθεν.
Relative: P. and V. ὅθεν, Ar. and V. ὅθενπερ, V. ἔνθεν (also Xen. but rare P.).