“Once a mother of the child of his father asked him (the Imam) (a.s.), saying, ‘I pray to Allah to keep my soul in service for your cause, I like to ask you a question but I feel shy.’ He (the Imam) said, ‘Ask and do not feel shy.’ She said, ‘There was blood from Hayd (menses) on my clothes and I washed it, but the stain does not go away.’ He (the Imam) said, ‘Color it with russet color so that it is mixed and does not show.’”