A gap of 2-4 hours between the final meal and sleep is often recommended, though personal experimentation is advised.

“A lot of people recommend putting a gap between your final bite of food and when you got to sleep at night. Some people say that gap should be 4 hours, other people say 2 hours, if you're me, I generally have something, I don't know, within 2 hours or 90 minutes of going to sleep, but it's not a big meal, but that's just me, and I fall asleep and stay asleep fine with that. You have to experiment for yourself.”