The Torah Portion of Vayeitzei
"...and he took from the stones of the place..." (Bereisheet 28:11)
It is written in the beginning that "he took from the stones of the place", in the plural, and afterwards it is written "..and he took the stone.." (Bereisheet 28:18) in the singular. The reason for this is that the stones began to argue with one another; one said "on me the Tzaddik (Righteous Man) will lay his head", and another one said "on me he will lay it". Immediately the Holy One Blessed Be He made them all into one stone. And the difficulty with this explanation is that also now the head of the Tzaddik would be resting on only one place, and if so, what is the benefit if they are all made into one stone? But the answer is, that if they are united together and there are no arguments, then there will not be any complaints from anyone at all.
"...and He will guard me on this way..." (Bereisheet 28:20)
The Sages say that Yaakov requested from the Holy One Blessed Be He that he should not stumble in the sin of Lashon Hara (forbidden speech). And see the Introduction to the book "Chafetz Chaim", that by sinning in Lashon Hara it is possible to transgress 17 negative commandments, 14 positive commandments, and 3 curses.
"...and she said 'This time I will give thanks to Hashem'; therefore she called his name Yehudah..." (Bereisheet 29:35)
The Sages say that from the Creation of the World there wasn't anyone who thanked Hashem like Leah. And it has been asked, weren't there many Tzaddikim (Righteous People) before her, and certainly they gave thanks to Hashem? The explanation is that Leah wanted to give thanks constantly, and therefore called her son Yehudah, which can be explained as thankfulness without interruption. (Translator's note: The name Yehudah is related to the word for thankfulness in Hebrew.) When she saw Yehudah she immediately began to thank Hashem, and at every time that Yehudah would come and go, and eat and sleep, she would always give thanks.
"...therefore she called his name Yehudah, and she stopped giving birth." (Bereisheet 29:35)
It has been asked, isn't thankfulness a good thing, yet in this verse the meaning seems to be that because she gave thanks to Hashem, she ceased to give birth? The explanation is that everyone needs to give thanks about the past and to pray about the future. Therefore when a man is asked "How are you?", he answers "Baruch Hashem V'yeracham Hashem" (Bless Hashem and may Hashem have mercy). But Leah only gave thanks about the past and didn't request on the future, and therefore she stopped giving birth.