The "Puranas" introduce themes that are echoed in later works, including the deception of the unsuspecting Ahalya by Indra's devious disguise as Gautama in his absence. The "Padma Purana" states that after Gautama leaves for his ritual bath, Indra masquerades as Gautama and asks Ahalya to satisfy him. Ahalya, engrossed in worship, rejects him, considering it inappropriate to have sex at the cost of neglecting the gods. Indra reminds her that her first duty is to serve him. Finally Ahalya gives in, but Gautama learns of Indra's deception through his supernatural powers and returns to the ashram. A similar account is found in the "Brahma Purana". At times, Indra takes the form of a cock that crows to dispatch Gautama for his morning ablutions, as in the 18th-century Telugu rendition of the tale by the warrior-poet Venkata Krishnappa Nayaka of the Madurai Nayak Dynasty. In other versions, he uses an accomplice, such as the moon-god Chandra, to distract Gautama. In the "Brahma Vaivarta Purana", Ahalya comes to bathe in the "Svarnadi" (heavenly river) and Indra becomes infatuated with her when he sees her. Assuming Gautama's form, Indra has sex with her until they sink to the river bed in exhaustion. However, Gautama catches them in the act. Another version in the same "Purana" focuses on the question of how the chaste Ahalya was seduced by Indra. In this version, Indra approaches Ahalya on the banks of the Mandakini river in his own form to ask for a sexual favour, which is flatly refused by Ahalya. Indra subsequently poses as Gautama and fulfils his objective.