וּמִקְנֶ֣ה ׀ רַ֗ב הָיָ֞ה לִבְנֵ֧י רְאוּבֵ֛ן וְלִבְנֵי־גָ֖ד עָצ֣וּם מְאֹ֑ד וַיִּרְא֞וּ אֶת־אֶ֤רֶץ יַעְזֵר֙ וְאֶת־אֶ֣רֶץ גִּלְעָ֔ד וְהִנֵּ֥ה הַמָּק֖וֹם מְק֥וֹם מִקְנֶֽה׃
Now the children of Reuben and the children of Gad had a very great multitude of cattle; and when they saw the land of Jazer, and the land of Gilead, that, behold, the place was a place for cattle,
However, in all subsequent verses ִin the weekly portion Gad is mentioned first and Reuven second (see verses 32:2, 6, 25, 29, 31, 33, 34 and 37). Does it have any relevance? What do commentators say about this issue? Does it matter that in Masei the order is reverted to the original (34:14)?