Genesis 24:14

and let it come to pass The servant contemplates the possibility of repeated application and failure. The sign for which he makes petition is the voluntary offer on the part of a girl to give water, not only to himself, but also to his camels. This would be no mere formality, but a practical and laborious act of kindness towards a stranger, done probably in the presence of many bystanders and idlers; and therefore making a demand upon energy and moral courage as well as physical strength.