Luke
Luke 21:13ESV·traditional attribution

This will be your opportunity to bear witness.

Matthew Henry Presbyterian

See here, I. With what admiration some spoke of the external pomp and magnificence of the temple, and they were some of Christ's own disciples too; and they took notice of it to him how it was adorned with goodly stones and gifts, Luk 21:5.

Commenting on Luke 21:5-19

John Gill Reformed Baptist

For I will give you a mouth,.... A faculty of speaking, a freedom of expression, a door of utterance, a good degree of elocution, to speak properly, pertinently and freely to any point: and wisdom; to answer with great propriety, and in the most prudent manner, to any difficult and ensnaring question; and to furnish with such knowledge of the Gospel, and with such gifts...

Jamieson-Fausset-Brown Reformed

for a testimony--an opportunity of bearing testimony.