Fasting after bathing in the day

[anzurna]

Assalam-o-alaikum, if someone has obligatory bath, he must perform bath before starting the fast. But according to the sunni school, the person can have bath before morning prayer and his fast will remain intact. Is there any shia Mar'ja with similar ruling?

Thanks.

[Fazeeh]

WS,

Quote

Among the acts that invalidate fasting of Ramdhan is intentionally staying in a state of janabat until the beginning of true dawn. So if such a person intentionally remains in that state without performing major ablution (ghusl) until the beginning of the true dawn in the month of Ramadhan, then it is obligatory upon him to refrain from the forbidden things for the remaining of the day.
(As a matter of obligatory precaution one should abstain with the intention of “ma fidh dhimma — what is expected of him”.) They should also make up this fast some other day [after Ramadhan] with the intention of “ma fidh dhimma” and also incur the penalty, based on obligatory precaution. If a person is sick and cannot perform ghusl because of his sickness, he should do tayammum before true dawn; thereafter, they will be considered to be in a state of ritual purity. Thus, they will be able to fast.

https://www.sistani.org/english/book/46/2035/

[anzurna]

thanks @Fazeeh I knew that ruling that's why I asked that, is there any Mar'ja who has different ruling similar to sunni school of thought that the person can perform the bath (ghusl) after the dawn and his fast will remain intact. 

Edited August 5 by anzurna

[Quran313]

Ghusl must be completed before start of Fajr Azan (all Maraji).

Another point which is not related to your question and may happen during the DAY like one sleeping at the middle of the day. Being in Jinabat state for long time invalidates the fasting. I don't know how long is meant but I usually do Ghusl right after I realized that I need to.