What does Genesis 31:9 mean?

Laban and his sons are resentful of Jacob for growing wealthy at their expense. Of course, the only reason their family had prospered in the first place was through Jacob's successful efforts (Genesis 30:27). What has actually happened is that God has intervened (Genesis 31:10–12) to turn Laban's continued attempts to cheat Jacob into great gain, instead (Genesis 30:37–43). Jacob is making the case to his wives that it was the Lord who caused this to happen, not him. The previous verse revealed that Laban changed the arrangement he had with Jacob several times in hopes of limiting how many of the flock Jacob could claim as his own.

However, when Laban would say "the spotted goats will be your wages," the Lord would cause all the new goats to be born spotted. When Laban changed it to striped goats, the Lord would supernaturally cause all the new goats to be striped. However Laban attempted to cheat Jacob, the Lord would cause Jacob to prosper, instead.

Now Jacob makes his point bluntly: God has taken away your father's livestock and has given them to me. Jacob's implication to his wives is twofold: One, your father should be mad at God, not me. Two, if you stick with me, you will have God on your side.