Or HaChaim on Genesis 48:9/אור החיים על בראשית מ״ח:ט׳

1 אשר נתן לי אלוקים בזה, "whom G'd has granted me here." Righteous people do not let an opportunity go by without acknowledging that anything they have received was a gift of G'd. We find an example of Jacob having done the same in Genesis 33,5.

2The reason Joseph added the words בזה, "in this place," was that he was grateful that even while he was in exile G'd had shown him favour. Moreover, we have learned in Sotah 36 that Joseph had been meant to beget twelve tribes but that the fact that he almost succumbed to the temptation of sleeping with the wife of Potiphar resulted in his begetting only two of the twelve tribes. The word ב־זה is an allusion to this. The letter =2ב, whereas the numerical value of the word זה is 12. The word therefore alerts us to the tradition that he had only two children instead of twelve. Joseph added the word אלוקים, which describes G'd as the judge of our actions. Joseph acknowledged the fairness of G'd's decision by ascribing the number of children he had been granted to אלוקים.