Av tohor time oriented commandments require prophetic mussar as the k’vanna for doing the external mitzva action. The entire first book of the Torah addresses Av tohor time oriented commandments which require k’vanna. The 4th blessing in the after meal benching … if you accomplish a Tohor Time Oriented mitzva in the first 3 blessings you can raise the rabbinic blessing to a mitzva from the Torah as well. Examine the קום ועשה מצוות of the B’Hag where he includes rabbinic time oriented commandments as part of the תרי”ג מצוות.
mosckerr