Utiliser "passant" dans une phrase

1. We are running towards what might be the right dock when she asks me, en passant, whether I have a fishing permit

2. qui me doit encore quinze roubles I won at cards, soit dit en passant

3. Those hands, en passant, showed a family feature common to all—namely, the feature that the flesh of the palm on the outer side was rosy in colour, and divided by a sharp, straight line from the pure whiteness of the upper portion of the hand