Does resigning from work and returning to one's home country, after a previous Istikhara prayer resulted in the facilitation of matters concerning coming to Saudi Arabia, constitute a defiance of God's will and a severance of provisions, and is a new Istikhara prayer required for the return?

If you travel to your country, you will not be disobeying Allah's will, but you may incur sin if you neglect obligatory rights. We believe that your remaining in Saudi Arabia is more appropriate for three reasons: your increased level of religiosity and commitment, the ease of performing rituals, and the improvement of your financial situation. As for performing Istikhara regarding leaving your job and returning, it is a legitimate request, and it is recommended to consult with people of sound judgment.