out of habit
from habit

I finished my drink, out of habit, and we left the Wait together.

But then he added almost out of habit, It's not that easy.

She's only moving out of habit There was a sound then.

She kept it out of habit - not with any other idea.

She had taken her boots off at the door only out of habit.

For the last week, though, she had done it only out of habit, without much hope.

For a moment he dropped his eyes out of habit.

Since then, they'd continued to meet at her place, just out of habit.

When it goes, they will murder each other out of habit.

I locked the door out of habit and turned to face the music.