Is it disliked to enter the water uncovered (without a garment)?

Primary text

It is disliked for one to enter the water except while covered. This prohibition stems from the report concerning Al-Hasan and Al-Husayn, who entered the water wearing two garments (birdan), and when questioned, they stated, 'The water has inhabitants' (li-l-ma'i sukkan). Furthermore, water does not conceal, thus exposing the nakedness of one who enters it unclothed. Ahmad holds this view.