Mark 14:11
And when they heard it, they were glad, and promised to give him money. And he sought how he might conveniently betray him. And when they heard it, they were glad, and promised to give him money. And he sought how he might conveniently betray him.
Those who heard and were glad were the Jewish priests and rulers, who wanted Jesus taken secretly because they feared a tumult among the people, and Judas, one of the twelve disciples, became the one to betray Him. They welcomed Judas's offer and promised him money for betraying Jesus, specifically thirty pieces of silver. Judas in turn sought a suitable and convenient opportunity to hand Jesus over secretly. The secret arrangement was that Judas would lead them to Jesus in a quiet place where they could seize Him without opposition. The verse thus shows Jesus sold by one of His own disciples, His Master sold for a paltry sum to ignominy and death.
Judas agreed to betray Jesus for money out of covetousness and love of money. His opposition to Mary's costly gift was not care for the poor but selfishness, showing he valued his Lord only enough to sell Him for a few pieces of silver. Love of money had perverted his nobler nature and made him a fit agent for Satan to use in the betrayal, after he was annoyed at the implied rebuke for his covetous spirit when Mary anointed her Lord with costly ointment and yielded to the tempter, giving Satan easy access to his mind. In deciding to betray Jesus, Judas had no thought that Jesus would permit Himself to be taken, but thought the priests would be cheated of their bribe while he secured the money for some purpose of his own, and that Jesus would have a new opportunity to display divine power in delivering Himself from His enemies. His example warns that covetousness can lead professed followers of Christ to trade good principles and generosity for earthly gain.