Exodus 31

6. I have given with him Aholiab--He belonged to the tribe of Dan, one of the least influential and honorable in Israel; and here, too, we can trace the evidence of wise and paternal design, in choosing the colleague or assistant of Bezaleel from an inferior tribe (compare 1 Corinthians 12:14-25 ; also Mark 6:7 ).
all that are wise-hearted I have put wisdom--At that period, when one spirit pervaded all Israel, it was not the man full of heavenly genius who presided over the work; but all who contributed their skill, experience, and labor, in rendering the smallest assistance, showed their piety and devotedness to the divine service. In like manner, it was at the commencement of the Christian Church ( Acts 6:5 , 18:2 ).

12-17. Verily my sabbaths ye shall keep--The reason for the fresh inculcation of the fourth commandment at this particular period was, that the great ardor and eagerness, with which all classes betook themselves to the construction of the tabernacle, exposed them to the temptation of encroaching on the sanctity of the appointed day of rest. They might suppose that the erection of the tabernacle was a sacred work, and that it would be a high merit, an acceptable tribute, to prosecute the undertaking without the interruption of a day's repose; and therefore the caution here given, at the commencement of the undertaking, was a seasonable admonition.

18. tables of stone, written with the finger of God--containing the ten commandments ( Exodus 24:12 ), called "tables of testimony," because God testified His will in them.