salams

i was told that in Bangladesh sperfically in sylhet shaha-jahal, it is known for a saint of some sort to have sailed the sea of bangal via prayer mats and that there is a famous foot print there.. and that they had married hindus thus making them to revert into Islam

theres a whole story but i thought it was a bit strange, as i had not heard this story mentioned in the Quran

i have though come across alot of Bengali`s who have this story fixcated in their mindset

please tell me wiether it is true or wiether it is a bidah so i may me able to claify the misconceptions

Jazarkhallahu Khayran

May ALLAH the most compassionate reward you abundantly