The Father Tantras (Tib. ཕ་རྒྱུད་, pa gyü, Wyl. pha rgyud) of the the Sarma schools are divided into the

• Desire Class, which includes the Guhyasamaja Tantra;
• Anger Class, which includes the Yamantaka Tantra; and
• Ignorance Class, which includes the Manjushri Tantra.

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