behold. Figure of speech Asterismos (App-6) for emphasis. Note also the "I "emphasised.
I have put, &c. See note on Exodus 31:2.
Related Commentaries of Exodus 31:6
Exodus 31:6
6 And I, behold, I have given with him Aholiab, the son of Ahisamach, of the tribe of Dan: and in the hearts of all that are wise hearted I have put wisdom, that they may make all that I have commanded thee;