Śānti-parva Adhyāya 30: Nārada–Parvata Samaya-bhaṅga, Śāpa, and the Marriage of Sukumārī
तौ तथेति प्रतिज्ञाय महर्षी लोकपूजितौ
tau tatheti pratijñāya maharṣī lokapūjitau
那两位为世所敬的大圣仙,以“如是”应诺,遂立誓言——昭示其庄严承诺:将依所约而行,秉持达摩之义与受人敬重之威仪。
श्रीकृष्ण उवाच
The verse highlights the ethical weight of a pledge (pratijñā): assent is not casual speech but a binding commitment, especially when made by revered authorities such as sages, whose conduct models dharma for society.
Two respected great sages respond “tathā iti” (“so be it”) and formally undertake a promise, indicating their agreement to proceed according to the discussed course of action.