וַתַּ֨הַר ע֜וֹד וַתֵּ֣לֶד בֵּ֗ן וַתֹּ֙אמֶר֙ הַפַּ֙עַם֙ אוֹדֶ֣ה אֶת־יְהוָ֔ה עַל־כֵּ֛ן קָרְאָ֥ה שְׁמ֖וֹ יְהוּדָ֑ה וַֽתַּעֲמֹ֖ד מִלֶּֽדֶת׃
그가 또 잉태하여 아들을 낳고 가로되 내가 이제는 여호와를 찬송하리로다 하고 이로 인하여 그가 그 이름을 유다라 하였고 그의 생산이 멈추었더라
Rashi
הפעם אודה NOW WILL I PRAISE [THE LORD] — because I have assumed more than my share, from now on I should praise God (Genesis Rabbah 71:4).
Chizkuni
ותעמד מלדת, “she was (temporarily) unable to conceive and give birth again. Seeing that several years later Leah did give birth to Dinah, the Torah chose a word (עמידה, temporary standing still) which indicated that her inability to give birth for a while was not due to her having become too old. She was not able to conceive and give birth again until after Asher had been born.
Da'at Zekenim
'הפעם אודה לה, “this time I give thanks to the Lord;” she foresaw that her son Yehudah would admit having wronged Tamar and embarrassing himself greatly in the process. (Genesis 38,26) She therefore decided to admit that she had been very wrong in deceiving Yaakov by posing as Rachel.