Imam Maalik مالك بن أنس بن مالك بن أبي عامر · The Book of Water

"The Messenger of Allah (ﷺ) said: 'None of you should perform Ghusl in standing water while he is Junub.'"

"If a dog licks the vessel of any one of you, let him wash it seven times, the first time with dust."

"While I was menstruating, I would nibble meat from a bone and the Messenger of Allah (ﷺ) would put his mouth where mine has been. And while I was menstruating, I would drink from a vessel and he would put his mouth where mine had been."