Salaam everyone, I would like to know, is the mariage between a Shia boy and a Shia Syeda girl permissible? I've heard it wasn't (and that stopping the legacy of our Holy Prophet (pbuhahp) was no less than a sin) but so far I've never been given evidence from our holy books or hadiths, hence leading me to think that this ideology was purely based on my country's castes culture and not necessarily on the true essence of Islam. Can anyone throw more light on this? I am only interested in evidence with proper quote and reference, not personal opinions! Thank you :)