Is it permissible for a menstruating woman to enter a graveyard? And is the Hadith, "The passing of a woman, a black dog, or a donkey in front of a worshiper invalidates his prayer," authentic or weak? And is it valid to perform ablution with water into which a woman has put her hand? And is betting with money among friends forbidden?

Visiting graves is permissible for women with certain conditions. Purity is not required to enter a graveyard. The hadith (definition) about prayer being interrupted by the passing of a woman, a donkey, or a black dog is authentic, and jurists have interpreted it as diminishing the reward, not invalidating the prayer. Using water in which a woman has placed her hand for ritual purification does not render it impure, unless she had an impurity that altered it, or if she used it for a ghusl (definition) and then became secluded with it (khulwa). In the latter case, it is permissible for the majority of scholars to purify oneself with it. Betting for money has details.