John Mark
Mark 14:11ESV·traditional attribution

And when they heard it, they were glad and promised to give him money. And he sought an opportunity to betray him.

Matthew Henry Presbyterian @wholebiblehenry

We have here instances, I. Of the kindness of Christ's friends, and the provision made of respect and honour for him. Some friends he had, even in and about Jerusalem, that loved him, and never thought they could do enough for him, among whom, though Israel be not gathered, he is, and will be, glorious. 1.

Commenting on Mark 14:1-11

John Gill Reformed Baptist @doctorgill

And when they heard it, they were glad,.... That such an opportunity offered, and from such a quarter, by one of his own disciples; so that it might be done more secretly and effectually, and with less blame to themselves: and promised to give him money; any sum he should ask; and what was agreed upon were thirty pieces, or shekels of silver; and so...

Adam Clarke Methodist @methodicalclarke

They were glad - The joy that arises from the opportunity of murdering an innocent person must be completely infernal.