Rabbi Yitzḥak began: “You shall make for Me an altar of earth…[I will come to you and I will bless you]” (Exodus 20:21). Rabbi Yitzḥak said: [God said:] ‘If, regarding this person who built an altar in My name, I will reveal Myself to him and bless him, Abraham, who circumcised himself in my name, all the more so.’ “The Lord appeared to him in the plains of Mamre.”
Rabbi Levi began: “And a bull and a ram as peace offerings, to slaughter before the Lord…[for today the Lord appears to you]” (Leviticus 9:4). He [God] said: ‘If, regarding this person who sacrificed a bull and a ram to My name, I will reveal Myself to him and bless him, Abraham, who circumcised himself in my name, all the more so.’ “The Lord appeared to him in the plains of Mamre.”