Kaṭha Upaniṣad · 1.1.3
तं कुमारं काल उपनीय वावस्वतं प्राप्य किंचिदवोचत् ॥ २ ॥
taṃ kumāraṃ kāla upanīya vāvaṃsataṃ prāpya kiṃcidavocat || 2 ||
Having been delivered to the Lord of Death (Yama), the boy waited three nights without food. When Yama returned, he said something.
This verse condenses a dramatic story in a few words. Naciketas has been “delivered” (upanīya) to the Lord of Death, Yama (also called kāla, time or death). The word vāvaṃsataṃ indicates that Naciketas spent three nights without eating (vāvaṃs means to fast or go hungry).
The number three is symbolically significant in Indian tradition: it represents the three guṇas (sattva, rajas, tamas), the three states of consciousness (waking, dream, deep sleep), and the three times (past, present, future). By spending three nights with Yama, Naciketas undergoes a symbolic transformation.
When Yama returns, he finds this young brahmachārī (student) waiting patiently. In Indian culture, a guest is sacred (atithi devo bhava — the guest is god), and a guest who has fasted for three days is especially worthy of honor. Yama, recognizing his duty as host and also impressed by the child’s constancy, decides to speak to him — “kiṃcidavocat” (said something).
This “something” that Yama says will be the offering of three blessings (varam), which constitute the framework for the entire teaching of the Kaṭha Upaniṣad.