Kātantra
Kāt 3.6.100
tṛtīyāder ghaḍhadhabhāntasya dhātor ādi caturthatvaṃ sadhavoḥ.
翻译
以不送气浊音为首以 gh、ḍh、dh 和 bh 为末的词根首音变成送气浊音，在 s 和 dhva 前。
Vṛtti 注释
dhātoravayavasya tṛtīyāderghaḍhadhabhāntasyādicaturthatvaṃ bhavati, āntaratamyāt, sakāre dhve ca parataḥ, dudhukṣati, adhugdhvam, aghukṣata, aghūdhvam, bubhutsate, abhuddhvam, dhīpsati, bhotsyate, nighokṣyate, ityādyantavadbhāvāt.
sadhvoriti kim? didambhiṣati, dugdhaḥ, dugdhavān.
punardhātugrahaṇam iha sukhārthaṃ ca.
笔记
词根的部分以第三音为首，gha、ḍha、dha 和 bh 为末的首音变成第四音，因为最接近，当后面是 s 字母和 dhve 时。例如 dudhukṣati, adhugdhvam, aghukṣata, aghūdhvam, bubhutsate, abhuddhvam, dhīpsati, bhotsyate, nighokṣyate, ityādyantavadbhāvāt.
...%sadhvoriti kim? didambhiṣati, dugdhaḥ, dugdhavān.
%punardhātugrahaṇam iha sukhārthaṃ ca.