Bartimaeus cried: Son of David, have mercy on me!
In this verse we see that it is a prayer that causes Jesus to stand still. The king gives audience to the beggar.
Now the mood of the public also changes. While at first they snubbed Bartimaeus, now suddenly he hears friendly words: Take heart. Get up; he is calling you!
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49 And Jesus stopped and said, “Call him.” And they called the blind man, saying to him, “Take heart. Get up; he is calling you.”