Our own words can kill us..A story...
I am reminded of a situation in the first Chapter of Devi Mahatmyam.(of Markandeya Puranam).
The Lord Vishnu was having his yogic sleep atop his cozy bed of Sesha the Snake floating in the Vast ocean covering the earth.deluged in the waters of deluge or Pralayam.
There came out of his ear wax two demons Madhu and Kaitabha.. and they started attacking Brahmadeva immediately..
Unable to resist, the four headed Creator entreated with Yogamaya Thamasi, , to rouse the sleeping Lord..
and Vishnu was woken up from His sleep and He fought with the demons for centuries with no success on either side ..
Then Devi entered the demons" mind as delusion or arrogance and prompted them to tell Vishnu that they were pleased with the way he and fought with them and so they would give him any boon He, the Vishnu, wanted...
The Lord, was very practical and did not resent the arrogance of the two demons..
He requested the He be granted the boon of the ability to kill those two fellows themselves..
The two demons were trapped.. bound by their own words, they granted the boons..
They just clamped only one condition.. Seeing the whole world covered with water they thought it would be impossible for the Lord to kill them in a place where there was not water and so they demanded themselves to be slain where no water was..
The Lord agreed and them simply caught hold of them, put them on his spacious laps and severed their heads with the Sudarsana Discus..
So Madhu and Kaitabha were actually killed by the words of their own mouth, uttered without thinking..