Skanda Purana — Kashi Khanda, Shloka 24
आस्तां गुरुकथा दूरं योऽन्यस्यापि लघोरपि । ओमित्युक्त्वा न कुरुते कार्यं सोथ व्रजत्यधः
āstāṃ gurukathā dūraṃ yo'nyasyāpi laghorapi | omityuktvā na kurute kāryaṃ sotha vrajatyadhaḥ
Leaving aside even talk of the Guru: if someone, even regarding another person’s small request, says “Yes” and then does not do the task, he goes downward, to ruin.
Skanda (deduced: Kāśīkhaṇḍa typically Skanda to Agastya)
Tirtha: Kāśī
Type: kshetra
Listener: Pilgrim-audience within the dialogue frame
Scene: A figure speaks ‘Om’ in assent, then turns away neglectfully; behind him a symbolic downward path/darkening aura indicates adhogati, while a righteous figure keeps his promise and is shown ascending/lightened.
FAQs
Integrity is dharma: do not consent lightly, and once you assent, complete the duty—otherwise there is moral downfall.
The broader scripture section is Kāśīkhaṇḍa (Kāśī), but the verse itself is an ethical maxim rather than a tīrtha-stuti.
None; it is a moral injunction about truthful assent and follow-through.