So here�s the Gemara that seichel cited
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Translated it means how do you know Hashem called Yaakov G-d? The passuk says �and He called to him/it G-d� if you think that Yaakov called the altar G-d it should have written and Yaakov called it, rather it says and he called to him to Yaakov G-d, and who called him G-d? The G-d of Israel