Several Historic mantras are located in the Saṃhitā portion of the Vedas. The Saṃstrikeās are one of the most historic layer of the Vedas, and incorporate several mantras, hymns, prayers, and litanies. Probably the most ancient Buddhist mantras will be the well known Pratītyasamutpāda-gāthā, also called the dependent origination dhāraṇī. https://www.youtube.com/@vashikaranspecialist1