Is it advisable to do meditation after meal at night?

After a sumptuous meal, generally, people feel drowsy. You may imagine that you are meditating, but it may be purely sleep in a sitting posture. If you follow the rules of Mitahara and take meals before 7 p.m., you can sit and meditate from 9 p.m. to 10 p.m.

Meditation at night, a second sitting, is absolutely necessary. If you do not have sufficient time at night, you can meditate even for a few minutes, say, ten or fifteen, before going to bed. By so doing, the spiritual Samskaras will increase. The spiritual Samskaras are valuable assets or priceless treasures for you. Further, you will have no bad dreams at night. The divine thoughts will be carried during sleep. The good impressions will be there.

Swami Sivananda