And they were glad, and covenanted to give him money.

People's New Testament

22:3-6 Then entered Satan into Judas. He gave himself up to do the work of Satan. See notes on Mt 26:14-16.

Jamieson-Fausset-Brown Bible Commentary

5. money-"thirty pieces of silver" (Mt 26:15); thirty shekels, the fine payable for man- or maid-servant accidentally killed (Ex 21:32), and equal to between four and five pounds of our money-"a goodly price that I was priced at of them" (Zec 11:13). (See on [1719]Joh 19:16.)

Matthew Henry's Concise Commentary

22:1-6 Christ knew all men, and had wise and holy ends in taking Judas to be a disciple. How he who knew Christ so well, came to betray him, we are here told; Satan entered into Judas. It is hard to say whether more mischief is done to Christ's kingdom, by the power of its open enemies, or by the treachery of its pretended friends; but without the latter, its enemies could not do so much evil as they do.