'Once' in the Bible

Once they crossed over, they came to land at Gennesaret.

telling them, “Go into the village ahead of you. At once you will find a donkey tied there, and a colt with her. Untie them and bring them to Me.

Seeing a lone fig tree by the road, He went up to it and found nothing on it except leaves. And He said to it, “May no fruit ever come from you again!” At once the fig tree withered.

Once more Jesus spoke to them in parables:

After leaving them, He went away again and prayed a third time, saying the same thing once more.

Or do you think that I cannot call on My Father, and He will provide Me at once with more than 12 legions of angels?