Question:
What's the source for saying:
If one comes to the Kotel on Shabbos or on Friday afternoon there is no obligation of Keriyah (which is a mourning practice). This does not apply to Motzaei Shabbos
Answer:
Hello,
The first half of what you are quoting is controversial. Some poskim say that there is no source to exempt one from ripping after chatzos, nevertheless this seems to be the custom in Yerushalayim. The only posek that I have seen that says Friday afternoon is permitted, but Motzei Shabbos isn’t, is R’ Yosef Leiberman zt”l in his sefer MIshnas Yosef. See sources.
Sources:
משנת יוסף ח"י סי' צ"ד אות ד' "והמנהג שבחוה"מ וערב שבת אחרי חצות לא קורעים על המקדש, בפרט אם כבר לבש בגדי שבת" ... במוצ"ש אין פטור זה".