סימן עו סעיף י
נוֹהֲגִין שֶׁבַּשַׁבָּת אֵין מַשְׁכִּימִין כָּל כָּךְ לָבֹא לְבֵית הַכְּנֶסֶת כְּמוֹ בְּחֹל, מִשּׁוּם דְּשֵׁינָה מֵעֹנֶג שַׁבָּת הִיא, וְאַסְמְכוּהָ אַקְּרָא, דִּבְקָרְבַּן הַתָּמִיד שֶׁל יְמוֹת הַחֹל נֶאֱמַר בַּבֹּקֶר, וּבְשַׁבָּת נֶאֱמַר וּבְיוֹם הַשַׁבָּת, דְּמַשְׁמַע אִחוּר. וּמִכָּל מָקוֹם צְרִיכִין לִזָּהֵר שֶׁלֹּא לְאַחֵר זְמַן קְרִיאַת שְׁמַע וּתְפִלָּה.
It is customary not to arise as early on Shabbos to go to the synagogue as during weekdays,30Bach 281. since sleep is one of the pleasures of Shabbos. This custom is supported by a Scriptural verse; concerning the daily offering on weekdays it is said: "In the morning," but concerning the Shabbos offering it is said: "And on the Shabbos day,"31The later Poskim raised the question that this verse is said in reference to the Mussaf offering and not the daily offering. Magein Avraham answered that since the Mussaf offering is brought later in the day (the sixth hour), the daily offering was also later than usual in order that there not be too much time between the two offerings. Also see Rashi (Maseches Yoma 70a). which indicates a later time (in the day). However you must be careful not to delay the reading of Shema and Shemoneh esreih [beyond the proper time, see chapters 17, 18.]
תנא דבי אליהו כל השונה הלכות בכל יום מובטח לו שהוא בן העולם הבא שנאמר הליכות עולם לו אל תקרי הליכות אלא הלכות (נדה ע"ג.)