The trinity of Gods, who are Brahma Ji the creator, Bhagwan Vishnu who is the protector and Bhagwan Shiv who is the destroyer are the guardians of the Universe and through them, Dharma functions as the soul of the Universe. They are the ultimate representations of truth, righteousness, and upholders of Dharma in the Universe and are free from all ego and arrogance. However, while Bhagwan Shiva nd Bhagwan Vishnu are worshiiped in temples, there is none for Brahma Ji. This is because of an incident where Brahma Ji was caught in his pride and ego and as a result got deprived of the same.
This was the time when Brahma Ji had five heads instead of four. Once a quarrel aroused between Bhagwan Vishnu and Brahma ji as to who was greater. While Brahma Ji claimed that he was the creator of the Universe, Bhagwan Vishnu asserted that he was the protector of the Universe and Brahma Ji himself was born out of his navel. Unable to come to a conclusion, they approached Bhagwan Shiv for a solution. Bhagwan Shiv took the form of Shivling and said the one who could first find the bottom or the top of it would be declared the winner. Bhagwan Vishnu took the form of a Varaha (boar) and starting digging the ground to find the bottom of the Shiv Ling. Brahma Ji set out to find the top of the Shivling on his swan vehicle.
The search continued for a long time. After diggig relentlessly, Bhagwan Visnhu realised that it was impossible to search the depth of Bhagwan Shiv, comes back and humble accepts his defeat. Meanwhile, Brahma Ji keeps on travelling up with a firmness to win the competition at any cost. Just as Bhagwan Vishnu Braham ji too gets tired, but his ego doesn’t let him accept defeat. He decides to trick his victory and searches of a false witness. He finds a Mugli flower (Mogle ka phool) and demands it to support him in his false statement that he could successfully reach the top of the Shivling.
Brahma Ji comes back and mentions to Bhagwan Shiva and Bhagwan Vishnu that he had seen the top of the Shivling and the Mugli flower was the witness to the same. Bhagwan Vishnu not knowing the falsity behind this accepts his defeat in front of Brahma Ji. But Bhagwan Shiv gets furious that Brahma Ji had resorted to lies to win the competition and not kept up the honour as the creator of the Universe. He snaps away the fifth head of Brahma Ji as a punishment and curses Brahma Ji that he would lose the privilege of worship and there would be no temples in his name as none could worship a God who himself spoke lies. Bhagwan Shiv then curses the Mugli flower that it would not be used in any worship to any God from hereafter for supporting Brahma Ji in his deceit. Hence, the Mugli flower is not be offered as part of any worship in any auspicious ritual.
Brahma Ji repents his mistake and asks for the forgiveness of Bhagwan Shiv. Then Bhagwan Shiv takes pity on him and says that there would be only one temple in Pushkar (Rajasthan) where he would be worshipped. Ego and false pride be it in God or human, only leads to trouble and hence should kept faraway from oneself.