After dvitīyā and tṛtīyā the Dative -4th Case, Ablative -5th case and Genitive 6th-Case singular may optionally get the augment syāṭ before which the ā of the aṅga (stem) is shortened.,
As द्वितीयस्यै or द्वितीयायै, तृतीयस्यै or तृतीयायै, द्वितीयस्याः or द्वितीयायाः, तृतीयस्याः or तृतीयायाः ॥,