In the chandas (Vedas) the affix kvasu is optionally the substitute for liṭ ,
As जक्षिवस् 1st. sing. जक्षिवान् 'eaten' (Yaj. (VIII. 19)); पपिवस् 1st. sing. पपिवान् 'drunk'.
Sometimes it does not come, as in the example under sutra 3.2.105; अहं सूर्यमुभयतो ददर्श.
The division of this sutra from the last, in which it could well have been included, is for the sake of the subsequent sutras, into which the anuvritti of क्वसु only runs.,