See Poole on "Matthew 10:19". See Poole on "Matthew 10:20". By take no thought, he means, take no anxious thoughts to disquiet yourselves.
Related Commentaries of Mark 13:11
Mark 13:11
11 But when they shall lead you, and deliver you up, take no thought beforehand what ye shall speak, neither do ye premeditate: but whatsoever shall be given you in that hour, that speak ye: for it is not ye that speak, but the Holy Ghost.