Question
Dear Rabbi, I was raised Shomer Negiah. I learned and practiced growing up that one is only permitted to touch their spouse and immediate family members of the opposite sex. I got married over the summer, and for the first time ever, I spent a holiday out of town with my in-laws. I had a really good time with them. But they made that impossible to follow. My mother-in-law, who dresses very modestly (albeit with short sleeves) and wears a sheitl, demands frequent hugs from me and she touches me in many different ways as if I’m her son. She is a very touchy hands-on person who constantly puts her hands on people, male and female alike, as she talks to them. It’s just the warmth she shows in her personality. I could sense she might get offended had I resisted, and to avoid an argument that would ruin our holiday visit or my relationship with her for years to come, I had to cave to her wishes. All the female members of my wife’s family, as well as some of their friends, all hugged me or shook my hand, and my wife did the same with male relatives and friends in my in-laws community. To them, it is all a normal behavior, just the thing they do. I was too afraid to offend anyone when they don’t know me well and I am trying to make a good impression. I did talk privately to my father-in-law about my concerns. He says their rabbi permits all this touching. I met that rabbi when I went to shul and I noticed he shakes a lot of women’s hands and even hugs some women who are close friends of his. He is very warm and friendly and beloved in the community. There is a side of me that is feeling guilty, that I should have stood up and made it clear to everyone that I strictly observe negiah laws. But I don’t know how to be very assertive and I felt too timid and I didn’t want them to think I’m crazy. I talked to my wife about it after we got home and she feels I should touch those who want it and not worry.

Question
Thank you in advance for this resource and your time and knowledge. My questions are simple and I look forward to their answers. Can you provide a source solely from the Tanach for the following claims: 1) That Gd gave Moses two torahs -- the second one being the oral Torah; and, 2) That the Tanach gives Rabbis authority to interpret the Torah and rule over its meaning. These are very basic questions. However, no one has been able to correctly answer either one. Can you?   Many thanks. -Marci