Nor by the earth, for it is his footstool,.... That the Jews were wont to swear by the earth, is clear from the above mentioned instances; and is condemned by Christ for this reason, because the earth is God's "footstool", referring, as before, to Isa 66:1 on which he treads; and where he also manifests forth his glory, and is a considerable part of the work of his hands.
Neither by Jerusalem, which the Jews used to swear by: such forms of vows as these are to be met with in their writings ;"as the altar, as the temple, Mlvwryk, "as Jerusalem";''that is, by Jerusalem, I vow I will do this, or the other thing."
R. Judah says, he that says Jerusalem (i.e. as Bartenora observes , without the note of comparison, as) says nothing.''In the Gemara it is,"he that says as Jerusalem, does not say anything, till he has made his vow concerning a thing, which is offered up in Jerusalem.'
'Dr. Lightfoot has produced forms of vowing and swearing, which have not occurred to me."Jerusalem; Mlvwryl, "for", or "unto Jerusalem", which exactly answers to eiv Ierosoluma, here; and "by Jerusalem";''The reason given for prohibiting this kind of oath, is;for it is the city of the great king: not of David, but of the King of kings, the Lord of hosts; who had his residence, and his worship, here; see Ps 48:2.
Misn. Nedarim, c. 1. sect. 3. In. ib. T. Bab. Nedarim, fol. 11. 1. In loc. ex Tosapht. in Nedarim, c.