The affix yat comes in the sense of 'given' after the word barhiṣ in the Locative -7th case in construction, in the chandas (Vedas).,
The anuvritti of तत्र भवः ceases. Thus बर्हिष्येषु॑ निधिषु प्रियेषु ॥ R. V. 10 15 5,
बर्हिषि दत्तम्
Adhyāya 4 · Pāda 4 · Rule 119