question #1 Sahih Muslim 789a, Book 6, Hadith 267 : What analogy is used to describe the importance of vigilance in retaining the memorization of the Qur’an?

The example of a man who has memorised the Qur’an is like that of a hobbled camel. If he remained vigilant, he would be able to retain it (with him), and if he loosened the hobbled camel it would escape.