NET
11 When they heard this, they were delighted and promised to give him money. So Judas began looking for an opportunity to betray him.
Darby
11 and they, when they heard it, rejoiced, and promised him to give money. And he sought how he could opportunely deliver him up.
KJV
11 And when they heard [it], they were glad, and promised to give him money. And he sought how he might conveniently betray him.