פּירוש אויף בראשית 28:22

וְהָאֶ֣בֶן הַזֹּ֗את אֲשֶׁר־שַׂ֙מְתִּי֙ מַצֵּבָ֔ה יִהְיֶ֖ה בֵּ֣ית אֱלֹהִ֑ים וְכֹל֙ אֲשֶׁ֣ר תִּתֶּן־לִ֔י עַשֵּׂ֖ר אֲעַשְּׂרֶ֥נּוּ לָֽךְ׃

און דער דאָזיקער שטײן װאָס איך האָב געמאַכט פֿאַר אַ זײַלשטײן, װעט זײַן אַ הױז פֿון גאָט; און פֿון אַלץ װאָס דו װעסט מיר געבן, װעל איך מעשׂרן מעשׂר צו דיר.

Rashi

והאבן הזאת THEN THIS STONE — This is how you should explain the ו of והאבן: if He will do these things mentioned in Genesis 28:15 as He promised, then I, also, will do this:
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Rashbam

עשר אעשרנו לו, to present to Him a burnt offering.
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Or HaChaim

והאבן הזאת, and concerning this stone, etc. According to Zohar 1,72 the stone in question is the אבן שתיה, the stone G'd used as the foundation of the Holy Temple and which He had buried in the interval in the depths of the abyss at the "navel" of the earth. According to Tanchuma Parshat Terumah, Jacob prepared the shittim wood for the Tabernacle in the desert at this time. Perhaps this is what G'd referred to in Exodus 25,8 when He said: "They shall make for Me a Sanctuary;" G'd referred to this wood from which the Israelites were to construct this Sanctuary. When the Torah there continued: "and I shall dwell amongst them," G'd may have referred to preparations made by Jacob for both the Tabernacle and the Holy Temple.
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Rashi

והאבן הזאת אשר שמתי מצבה THEN THIS STONE WHICH I HAVE SET UP FOR A PILLAR etc. — Explain it as the Targum translates it: “I shall serve the Lord upon it” This, indeed, he did on his return from Padan-aram, when God said to him, (Genesis 35:1) “Arise, go up to Bethel”. What is stated there? “And Jacob set up a pillar … and he poured out a drink-offering thereon” (Genesis 35:14).
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