ὁ χρόνος ἐστὶ δάνος, τὸ ζῆν πικρός ἐσθ' ὁ δανίσας → time is a loan, and he who lent you life is a hard creditor | time is on loan and life's lender is a prick
interrogative: P. and V. πόθεν.
relative: P. and V. ὅθεν, Ar. and V. ὅθενπερ, V. ἔνθεν (also Xen. but rare P.).