“I once asked abu al-Hassan (a.s.), about Ghusl (bath) of Ziyarah, he does Ghusl during the night and visits (the House) with one Ghusl, is that sufficient?“ He (the Imam) said, ‘It is sufficient as long as things invalidating wudu does not take place, and if something as such takes place, one must take Ghusl again during the night. ‘“