וַיָּבֹ֧א אֱלֹהִ֛ים אֶל־לָבָ֥ן הָאֲרַמִּ֖י בַּחֲלֹ֣ם הַלָּ֑יְלָה וַיֹּ֣אמֶר ל֗וֹ הִשָּׁ֧מֶר לְךָ֛ פֶּן־תְּדַבֵּ֥ר עִֽם־יַעֲקֹ֖ב מִטּ֥וֹב עַד־רָֽע׃
איז גאָט געקומען צו לָבָן דעם אַרַמי אין אַ חלום פֿון דער נאַכט, און האָט צו אים געזאָגט: היט דיך, זאָלסט ניט רעדן מיט יעקבן פֿון גוטס ביז שלעכטס.
Rashi
מטוב עד רע EITHER GOOD OR EVIL — why should he not speak good? Because all the good that the wicked do to the righteous is evil in the opinion of the righteous (Yevamot 103b).
Ramban
LABAN THE ARAMEAN. The intent of this is to relate that even though he was an Aramean, and the people of his place used teraphim and were soothsayers like the Philistines,215Isaiah 2:6. yet the prophetic dream came to him in honor of the righteous one [Jacob]. Similarly, And Jacob outwitted Laban the Aramean:216Verse 20 here. [the epithet “Aramean” is mentioned in order to indicate that] even though Laban was the Aramean, the diviner and owner of teraphim, [he was still outwitted by Jacob].