E.G.W. Prayer Series: When Walking & Working

Selected Messages vol.3, p.267

Not Always Necessary to Bow.--It is not always necessary to bow upon your knees in order to pray. Cultivate the habit of talking with the Savior when you are alone, when you are walking, and when you are busy with your daily labor.

Pray without ceasing.

1 Thessalonians 5:17