Authenticity of Hadith about Lying

What should a person do if he committed the secret habit twice after the first stage of exiting ihram in Hajj?

He used to invalidate his fast several years ago, and he does not know the number of days on which he broke his fast

He was fasting and he told someone that he was not fasting; what is the ruling on his fast?

Bad attitude on the part of the daa‘iyah is an obstacle to da‘wah

Is it permissible for him to go for ‘umrah when there is an unsettled dispute between him and his friend?

A servant is not getting her salary or food

How should the family deal with a disobedient son?

His wife accused his mother of stealing her ring!

How can she rid herself of lesbian desires?