Who imparted Sri Rama the knowledge of divine weapons?

Those, who read Bala Kanda of Srimad Ramayana, and those, who saw the movies/TV shows on Ramayana, may laugh at me!

According to Bala Kanda of Srimad Ramayana, it was Sage Viswamitra, who imparted Sri Rama the knowledge of divine weapons 

Sri Rama eliminates Tataka in the Forest.  On staying that night there in Tataka forest, on the next day morning the greatly renowned sage Vishvamitra, smilingly and wording sweetly spoke to Rama.

परितुष्टो अस्मि भद्रम् ते राजपुत्र महायशः |
प्रीत्या परमया युक्तो ददामि अस्त्राणि सर्वशः || १-२७-२

"I am highly pleased with you, oh, illustrious prince Rama, let safety be with you, I will now give you all of the divine missiles in utmost fondness of mine"

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However, Ayodhya Kanda gives a different name as to who gave the knowledge of divine missiles to Sri Rama.

While assuaging Kausalya, who was wailing at the decision of Sri Rama to move to the Forest, Sumitra, another wife of King Dasaratha and the mother of Lakshmana and Satrugna, says as follows:

ददौ च अस्त्राणि दिव्यानि यस्मै ब्रह्मा महा ओजसे |
दानव इन्द्रम् हतम् दृष्ट्वा तिमि ध्वज सुतम् रणे || २-४४-११
स शूरः पुरुषव्याघ्रः स्वबाहुबलमाश्रितः |
असन्त्रस्तोऽ प्यरण्यस्थो वेश्मनीव निवत्स्यति || २-४४-१२

"Formerly, when Rama killed  the son of Timidwaja, the chief of demons, Brahma being delighted , gave celestial weapons to Rama, the man with great splendor. Rama the hero and the tiger among men, relying on the strength of his own arms, will dwell fearlessly in the forest as if in his own palace"

Who was this Timidwaja, the Chief of demons?

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Sage Valmiki gave the description of Timidwaja in the 9th Sarga of Ayodhya Kanda.

While trying to persuade Kaikeyi in asking 2 boons from King Dasaratha, Manthara, the maid says as follows:

 तव दैवासुरे युद्धे सहराजर्षिभिः पतिः |
अगच्छत्त्वामुपादाय देवराजस्य साह्यकृत् || ९-२-११
दिशमास्थाय वै देवि दक्षिणां दण्डकान् प्रति |
वैजयन्तमिति क्यातं पुरं यत्र तिमिध्वजः || ९-२-१२

स शम्बर इति ख्यातः शतमायो महासुरः |

ददौ शक्रस्य संग्रामं देवसङिघैरनिर्जितः || ९-२-१३

"O Queen! Once upon a time, when there was a battle between celestials and demons, your husband Dasaratha went along with you and other holy kings to help Indra in battle, to a famous city called Vaijayata in which the demon Timidhwaja lived in a southern direction in the forest of Dandaka."

"That great demon famously called Shambara, who had several magic effects, defeated all the celestials and conferred battle upon Devendra."

So Sri Rama killed the son of this Shambara (also known as Timidhwaja).  

However, except eliminating Tataka, a demoness and Subaahu (while protecting the Yagna of Sage Viswamitra), Sri Rama did not wage war on any demon.  The weapon of Sri Rama threw demon Maaricha into ocean, but did not kill him.

Hence, Subahu must be the son of  Shambara (also known as Timidhwaja).

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Coming to the main point, upon eliminating Subahu, Lord Brahma, but not Sage Viswamitra,  imparted the knowledge of divine weapons to Sri Rama.

This narration gives strength to my idea that Bala Kanda must be partially interpolated.  

See my articles at the following links.

https://sriramayanakandukuri.blogspot.in/search/label/G.35.01%20General%20-%20Does%20Bala%20Kanda%20contain%20partial%20insertions%3F%20-%20Part-1

https://sriramayanakandukuri.blogspot.in/search/label/G.35.02%20General%20-%20Does%20Bala%20Kanda%20contain%20partial%20insertions%3F%20-%20Part-2