Rizk being extended after marriage
Q: A brother is struggling with a job. I have always been favoured by Allah Ta'ala. As soon as I got married my rizk was granted and as my family grew so Allah Ta'ala increased my rizk. This is anecdotal evidence from my experience. Based on this can I encourage the brother to marry and in turn his rizk will be extended?
What is the sunnatullah (sunnah of Allah SWT)? Please explain.