One day, one of the disciples of Bayazid (Alaihi Rahma) asked him:
– Will you give a piece of your coat so that I can carry it with me to gain blessing?
Bayazid responded:
– O my son, if you do not improve yourself until you become a perfect person, it is not going to help you even if you cover your entire body with my skin.
The above story about Bayazid Bistami is well known for illustrating that one cannot reach high levels of spiritual attainment only by virtue of externally improving oneself.
Marhaba Ya Mustafaﷺ 