The augment yāṭ is added to the case-endings of the Dative -4th Case, Ablative -5th case and Genitive 6th-Case singular after a feminine aṅga (stem) ending in ā,
As खट्वायै, बहुराजायै, कारीषगन्ध्यायै, खट्वायाः, बहुराजायाः, कारीषगन्ध्यायाः ॥ But in the compound अतिखट्व, (from खट्वामतिक्रान्तः), this rule does not apply, on the maxim ङ्याब् ग्रहणेऽदीर्घः as the आ has been shortened here. Even when the word अतिखट्व assumes the form अतिखट्वा in the Dative by 7.3.102, the affix does not take the augment याट्, because this long आ is a lakshanika आ only, while the आ of the sutra is a pratipadokta (लक्षणप्रतिपदोक्तयोः प्रतिपदस्यैव) ॥,