For it will not be you who speaks, but [rather] the Holy Spirit of your Father will be speaking in you.

While Jesus was still speaking to the large crowds, His mother and [half-] brothers were standing outside [of the large house. See 13:1] wanting to speak to Him.

Then the head priest tore at his clothing [i.e., as an expression of frustration], saying, "He has spoken against God [i.e., by claiming Deity for Himself]. What additional need do we have for witnesses? Look, you [yourselves] have now heard him speaking against God.