"No Sabbath laws apply wherever there is doubt that life is in danger." ~~ Yoma 8:6
"The Sabbaths are for rest and the festivals for joy, not for fasting and weeping and crying." ~~ Maimonides
"A charity pledge may be taken even on Sabbath eve. " ~~ Talmud, Bava Batra
"Sabbath has a flavor of Paradise about it." ~~ Talmud, Berakhot
"More than Israel has preserved the Sabbath, the Sabbath has preserved Israel." ~~ Achad Ha’am
"The Sabbath and holidays are the primary reason for Jewish endurance and glory." ~~ Judah Halevi
"It is permissible to assign charity to the poor on the Sabbath." ~~ Eleazar b. Pedat
"It is the Sabbath, and one should not weep, for healing is nigh to come." ~~ Talmud, Shabbat
"One should not ask about demons on the Sabbath. " ~~ Talmud, Sanhedrin
"Great is the Sabbath, since it outweighs all religious precepts." ~~ Midrash Gadol Ugdula
"The Sabbath was given for the study of the Torah." ~~ Talmud, Pesikta R. 22
"On six days work may be done, but on the seventh day you shall have a Sabbath of complete rest, holy to the Lord." ~~ Exodus (Shmot) 35:2