'Once' in the Bible

Finally, Abraham inquired, "I hope my LORD will not be angry if I speak only once more. What if ten are found there?" He replied, "For the sake of those ten I won't destroy it."

As it was, when it was time for the livestock to breed, I once looked up in a dream, and the male goats that were mating with the flock were producing streaked, speckled, and spotted offspring.

Meanwhile, these past 20 years that I've been with you, your sheep and goats never had miscarriages, I never once ate any of the rams from your flock,