Sometimes while I am sleeping, saliva drips from my mouth onto the pillow. What is my obligation here while I am fasting? When I wake up, should I spit it out? Is it sufficient to just wipe my lips from the saliva that has dripped? If it accidentally goes back into my mouth and I swallow it, does that invalidate my fast? Do I only have to make up the day, or is there a need for expiation as well?