The final of the aṅga (stem) of hā (juhotyādigaṇaḥ (3rd Conjugation)) is elided before an affix beginning with y being a sārvadhātuka kit or ṅit affix.,
Thus जह्यात्, जह्याताम् and जह्युः ॥,
Adhyāya 6 · Pāda 4 · Rule 118
The final of the aṅga (stem) of hā (juhotyādigaṇaḥ (3rd Conjugation)) is elided before an affix beginning with y being a sārvadhātuka kit or ṅit affix.,
Thus जह्यात्, जह्याताम् and जह्युः ॥,