Innocent blood is a Hebrew idiom for the death of “an innocent man” (Good News Translation). Die Bibel im heutigen Deutsch inverts the order of the two clauses: “An innocent man will be killed, and I have betrayed him.” In fact some translations find it natural to restructure even more radically, as they put I have sinned at the end of these clauses: “I have betrayed an innocent man who will now be put to death. This was a sin” or “A man will die because I sinned and betrayed him.”
The literal expression What is that to us? (so also New English Bible, New Jerusalem Bible) is translated “What do we care about that?” by Good News Translation. A statement may be substituted for the rhetorical question: “We don’t care about that” or “That has nothing to do with us” (Barclay).
See to it yourself is represented in Good News Translation by a form familiar to speakers of American English: “That is your business!” However, this restructuring may prove difficult for persons without a thorough knowledge of the language. It may be better to render “That is your concern” (New Jerusalem Bible) or “That’s your problem!”
Verses 4-5 seem to suggest that Judas approached the chief priests within the Temple building itself, and that this happened while they were in session. But such a supposition encounters at least two difficulties: (1) according to verse 2, the chief priests had already gone to the residence of Pilate, and (2) it is impossible that the Temple building would have been accessible to the general public. It is difficult to know precisely what Matthew had in mind, but for languages which require that the translation be specific, it is best to state that Judas threw the coins into the Temple, though not actually entering himself. This much is supported by the Greek, which does not explicitly state that Judas actually went in.
Quoted with permission from Newman, Barclay M. and Stine, Philip C. A Handbook on the Gospel of Matthew. (UBS Handbook Series). New York: UBS, 1988. For this and other handbooks for translators see here .