Indra once offended his spiritual master Brhaspati. The demons were quite submissive to their spiritual master Sukracharaya and when there was battle between devas and demons, the demons were victorious, on account of their submission to their Guru Shukracarya. When the devas found that Shukracharya was using amrta sanjeevani mantra which was bringing the dead and injured demons back to life, Brhaspati summoned his son Kacha to go and learn the mantra from Shukracarya. Kacha wholeheartedly accepted his father’s instruction and kept it as his only goal. So Kacha went to other camp and offered respects to Shukracharya and told him to accept him as his disciple. Sukracharya knew that Kacha’s inner motive is to learn the amrta sanjeevani mantra. So he was determined not to teach that to him, but still allowed him to stay with him. In course of time, Shukracharya’s daughter, Devayani fell in love with Kacha and decided that she will marry him. The asuras did not like Kacha’s presence and so they decided to kill him. They chopped him into pieces and threw all the pieces in different directions. In the evening Devayani, not finding Kacha, went to her father and said, “Father, I feel that something wrong has happened. Please use your amrta sanjeevani and bring Kacha back as I want to marry him.” So to please his daughter, Shukracharya chanted the mantra and from nowhere Kacha appeared again. Kacha requested him to teach the mantra with which he brought him back. But Shukracharya refused to give it. Kacha waited patiently. The next time the demons took him to a faraway place to kill him. They ground his body in the grinding mortar into a nice paste and trew the paste into the ocean. Again Devayani cried and amrta sanjeevani was chanted and Kacha came back. Kacha requested Shukracharya for the mantra, but again he was denied. Kacha did not lose heart. He remembered the force and power of obedience – the potency of obedience. Next time the asuras wanted to make sure that the mantra is not used. So they killed Kacha, they chopped him up, they ground him, made him into a paste and then they took a glass of wine and they poured the powder into the wine and gave it to Sukracharya to drink. So in the evening, when Devayani asked for Kacha, Sukracharya realized that Kacha is in his stomach. But if he comes out, he will kill Shukracarya himself. Kacha spoke from within the stomach. Kacha said, “Shukracharya, I have a suggestion. You have no choice. If you want to live, you have to teach me amrta sanjeevani because when you first use amrta sanjeevani, and I come out, you will be dead. Before that if you teach me amrta snjeevani, then when you are dead, I will use amrta sanjeevani and bring you back to life.” Then Shukracharya had no choice and he had to teach the mantra. Grudgingly he blessed Kacha and said, “I do not know where you learnt this trait, but by the power of your obedience to your father and spiritual master, you have literally extricated this mantra from me which even the greatest of the devatas could not learn.”