Genesis 24:20

24:20 She quickly emptied her jug into the watering trough and ran back to the well to draw more water until she had drawn enough for all his camels.

Genesis 30:38

30:38 Then he set up the peeled branches in all the watering troughs where the flocks came to drink. He set up the branches in front of the flocks when they were in heat and came to drink.