In his speech, the BJP veteran also accused the Congress of practising "divide and rule" policy to pit one religion against another.
Singh reiterated that the fighter planes were meant only for self-defence and not for aggression.
Pictures of Singh receiving the first Rafale jet in France had shown him drawing an "Om" sign in devnagri script on the cutting edge plane and also placing lemons under the wheels.
During his three day-visit to France, Singh met French President Emmanuel Macron and also held talks with his French counterpart Florence Parly on ways to bolster the defence ties.
Rafale, which is not only unmatched with its ability to suppress and blind enemy sensors and radars, can also engage enemy aircraft or ground targets, while remaining much inside Indian airspace.
Rajnath Singh, who is on a three-day visit to France, attended a ceremony Tuesday at aircraft maker Dassault Aviation facility in Merignac, southwestern France.
The Shashtra Puja is a ritual associated with Navratra where warriors re-dedicate their weapons to uphold justice and truth.
Defence Minister Rajnath Singh will be receiving the first Rafale fighter aircraft in France on October 8 when he is also scheduled to fly a sortie.
The purchase of another 36 Rafale fighter jets will take the fleet to 72, which will be key to bolster India's air power, particularly in the aftermath of the Balakot strike.
Nirmala Sitharaman said the money from offset is for training purposes and an agreement in this regard has now been signed with Dassault.
Unidentified persons broke into India's Rafale office in Paris last month in a possible espionage attempt to steal data related to the aircraft critical to India's national security plans.
Nambiar, who reached Paris four days ago, flew the aircraft in France to assess its efficacy.
The former defence minister accused Sitharaman of trying to tarnish the image of public-sector Hindustan Aeronautics Limited.
Answering questions ranging from lack of experience to state-owned HAL being overlooked for the deal, the group said Ministry of Defence has no role in selection of Indian partners by foreign vendors
Sitharaman's response, in a written reply, came to a question by Samajwadi Party Rajya Sabha member Naresh Agrawal seeking to know why the government was not disclosing details of the deal.