Premanand Maharaj Ji
Why do I feel sleepy and lazy when I try to do naam jap, and what should I do?
Sleep in bhajan comes from tamogun
Sleep and laziness during bhajan come from the influence of tamogun, and the mind slips into sleep when it does not find joy in bhajan. Find joy in bhajan and, when sleep comes, stand up.
Sleep exists only in tamogun. Sleep, laziness and negligence are called tamasic; they come from the influence of tamogun.