Cross reference
Luke 21:14
14 So take care not to be troubled before the time comes, about what answers you will give:
Mark 13:11
11 And when you are taken and given up to be judged, do not be troubled about what to say: but whatever is given to you in that hour, say: because it is not you who say it, but the Holy Spirit.
Luke 12:11-12
11 And when they take you before the Synagogues and the authorities and the rulers, take no thought about what answers you will give, or what you will say:
12 For the Holy Spirit will make clear to you in that very hour what to say.
Matthew 10:19-20
19 But when you are given up into their hands, do not be troubled about what to say or how to say it: for in that hour what you are to say will be given to you;
20 Because it is not you who say the words, but the Spirit of your Father in you.