Mark 10:48

And many charged him that he should hold his peace
And be silent, and not call him the son of David, at least; nor ask any thing of him:

but he cried the more a great deal:
he lifted up his voice more loudly, and repeated the same words quicker and oftener, and with greater vehemency and importunity:

thou son of David, have mercy on me; (See Gill on Matthew 20:31).