Saint Faustina prayed the Rosary every day. One time, she wrote:
… [One time] I saw many demons. One of these tried to vex me; taking the form of a cat, he kept throwing himself onto my bed and on my feet, and he was quite heavy, as if [weighing] a ton. I kept praying the rosary all the while, and toward dawn these beings vanished, and I was able to get some sleep. (412)
It is said that the Rosary is not biblical but rather vain repetitious prayer that is idolatry. Hear Fr.
I also withhold My punishments only because of you. You restrain Me, and I cannot vindicate the claims of My justice. You bind My hands with your love (Diary, 1193).