treatment of relatives


Slave of Allah (swt)
aslam o aliakum wr wb

hope all is well

So how a husband should behave with his wife relatives, aka his in laws

I need to give some dawah and i need quranic ayah, hadith or reliable article ... anything that i can use with reference to learn more about how islam says the relationship of the husband should be with his wife relatives

and also is it better to help financially wife relatives (if they are in need) or other poor people ? I know the answer but can use some references

JazakAllah khair again