Genesis 31:13

האל בית אל is the same as אל בית אל the ה of האל being redundant. It is customary for Scripture to speak thus, e. g. (Numbers 34:2) “When ye come into the land of Canaan הארץ כנען (instead of ארץ כנען). משחת שם WHERE THOU ANOINTEDST [A PILLAR] — This denotes distinction and eminence just as when one is anointed king one is raised to eminence: thus, too (Genesis 28:18) “and he poured oil upon the top of it (the stone)” that it might be anointed to be an altar (thus being distinguished among other stones). אשר נדרת לי WHERE THOU VOWEDST A VOW UNTO ME —and you are bound to fulfill it, for you said (Genesis 28:22) “it shall be God’s house”, signifying that you would offer sacrifice there.

I am the God of Bet-el, where thou didst anoint a pillar, and where thou didst vow a vow to me: now arise, get out of this land, and return to the land of thy birth.

אָנֹכִ֤י הָאֵל֙ בֵּֽית־אֵ֔ל אֲשֶׁ֨ר מָשַׁ֤חְתָּ שָּׁם֙ מַצֵּבָ֔ה אֲשֶׁ֨ר נָדַ֥רְתָּ לִּ֛י שָׁ֖ם נֶ֑דֶר עַתָּ֗ה ק֥וּם צֵא֙ מִן־הָאָ֣רֶץ הַזֹּ֔את וְשׁ֖וּב אֶל־אֶ֥רֶץ מוֹלַדְתֶּֽךָ׃