Reply To: Where it says that there is a jiyub to put on Tfillin every day?

In Shvuos 25b it is clear that there is a Chiyuv every day. The Gemara states clearly that you cannot swear that you won’t put on Tefillin that day.

Karkafta Delo Manach Tefillin is a separate issue. It is about that Tosafos says it refers to one who never put on.

Tosafos in Shabbos 131 seems to imply that any Mitzva which is constant is bound to each day.