Tarpan, derived from the Sanskrit root 'Trup' (to satisfy), is the Hindu ritual of offering water, often mixed with black sesame seeds (til) and barley (jau), to deities, sages, and especially to deceased ancestors (Pitrus). In Gaya, performing Tarpan holds supreme significance as it's believed this specific location provides unparalleled spiritual merit, satisfying the ancestors and aiding their journey towards liberation (Moksha).

The Phalgu River is central to Tarpan and Pind Daan in Gaya. Legend states Mata Sita cursed the river to flow underground due to its falsehood, hence its sandy appearance. Despite this, the river is considered extremely holy, embodying Lord Vishnu himself. Its water, accessed by digging, is essential for the Tarpan offerings and purification baths (snan), acting as a divine medium to carry offerings to the ancestors

The Vishnupad Temple, housing Lord Vishnu's footprint, is the spiritual epicenter of Gaya. While Tarpan itself is mainly performed by the Phalgu river, the overall Shraddha ceremony, of which Tarpan is a part, often culminates or includes rites within or near the Vishnupad temple complex. It signifies performing the rituals directly in the presence of Lord Vishnu, enhancing their efficacy

While Tarpan can technically be performed daily after a morning bath, the most auspicious and significant period is Pitru Paksha, a 16-lunar-day period (usually in September-October) specifically dedicated to ancestral worship. Gaya hosts a large Pitru Paksha Mela during this time, attracting millions. Performing Tarpan on the specific 'tithi' (lunar day) corresponding to the ancestor's death anniversary during Pitru Paksha is considered highly effective. Amavasya (new moon days) are also auspicious.

The cost (Dakshina given to the priest) varies widely. If performed as a standalone ritual, it might be less, perhaps in the range of INR 1000-3000. However, Tarpan is usually part of the larger Pind Daan ceremony. Costs for Pind Daan packages in Gaya can range from a basic INR 1200-5100 to more elaborate ones costing INR 11,000-21,000 or more, depending on the duration (1-day, 3-day, etc.), number of 'vedis' (altars) covered, and materials included. It's advisable to agree on the Dakshina beforehand during the Sankalpa (vow). Additional costs include fees at different sites (INR 200-300 per site typically) and optional charity/donations

Under the guidance of a Gayawal Panda (priest), the performer (Karta), after a purificatory bath (often in Phalgu) and wearing clean attire, faces south (direction of ancestors). They take water mixed with black sesame seeds, barley, and sometimes milk, using Kusha grass. Reciting mantras and the names/gotra of ancestors, they offer the water (anjali) from specific parts of the hand (between thumb and forefinger for Pitrus) into the river or designated spot, praying for the ancestors' satisfaction and peace.

Traditional views often restricted women, particularly from performing the main rites alone. However, there's growing acceptance and scriptural basis (like Garuda Purana referencing instances like Mata Sita performing rites) for women, especially daughters (if no sons exist) or daughters-in-law, to perform Tarpan and Pind Daan in Gaya. Some sources suggest women should use white sesame seeds instead of black. While direct performance by Gayawal Pandas might still primarily involve men, women actively participate alongside male family members, and increasingly perform rites themselves, especially at places like Matru Gaya or if no male heir is present.

• Tarpan: Offering of water (with sesame seeds, etc.) to satisfy the thirst of ancestors. It's a libation.
• Pind Daan: Offering of Pindas (rounded balls of rice/barley flour mixed with ghee, honey, milk, sesame) representing the physical body, to nourish the ancestors.

While distinct, Tarpan is an integral and mandatory part of the larger Shraddha and Pind Daan ceremony performed in Gaya. Pind Daan is considered incomplete without Tarpan. They are almost always performed together during the main ancestral rites in Gaya