Which Vedic text prescribes Pind Daan most specifically?

The Taittiriya Brahmana (Pinda Pitryajna section) and the Shatapatha Brahmana contain the most specific and detailed Vedic prescriptions for Pind Daan as a named ritual. The Grihyasutras (particularly the Ashvalayana and Paraskara) provide the most practically detailed household instructions. Among the Samhitas (the core Vedic hymn collections), Shukla Yajurveda 19.46 is the clearest direct mandate for the Pinda offering.