Maaseh Rav Siman 64
Can copy this into an AI, or connect the whole library to your assistant. For deeper learning, you can directly use the original seforim, sites, and apps.
תפלת מנחה מקדים. ובשבת מקדים יותר משום סעודה שלישית:
Sefaria Community Translation
The Mincha prayer should be early. On Shabbat, even more so because of the third meal.