The affix phak comes after the words harita etc. when they end in the affix añ -- anṛṣyānantarye bidādibhyo'ñ [[4.1.104]],
The words हरित &c, form a subdivision of बिद class, which class by 4.1.104 takes the affix अञ् in forming Gotra words. Thus the Gotra descendant of हरित will be हारित (हरित + अञ्). The son of हारित will be formed by this sutra and not by 4.1.95. Thus हारित + फक् = हारितायनः \the son of Harita or the great-grandson of Harita\. In fact, the force of the affix फक् of this Sutra is that of a Yuvan affix, though it is taught in the chapter of Gotra affixes; because according to the general rule 4.1.98 one Gotra affix can be only added to a word, and the word हारित that being already formed by a Gotra affix अञ् will not take again another Gotra affix फक् ॥ Therefore, फक् as is here a Yuvan-affix.,
