130914 [Text] 오늘 우리무대는어땠나요?? 큰무대라 떨렸지만 우리아미들 응원소리 덕분에 정신 바짝 차리구 신나게했어요ㅎㅎ 짱짱아미들~~ [Trans] How was our performance today?? I was nervous since it was a big stage but, thanks to the cheering voices of our ARMYs, we concentrated and it was lots of fun heuheu ARMYs you’re the best~ Translated by Iraide of bts-trans on tumblr.
130914 [Text] 안녕하세요 진입니다 오늘 음악중심 인천까지 와주신 우리 아미들 너무 감사드려요!! 아직 남은 많은 무대 즐겁게 즐기다 가셨으면 좋겠진!! 비가 안와서 다행이에요. [Trans] Hello, I'm Jin. Thank you so much to ARMY who came all the way to Incheon for Show Music Core!! Enoy the rest of the performances, I hope you go!! I'm glad it didn't rain. Translated with papago
ARMY NOTES -Based on posting times, the top tweet is Jimin (he posted a photo less than a moment later) and (as Jin says) the bottom one is Jin. -There is an episode of Music Core that aired on the 14th of September 2013 that the members were featured in (Stages: 1 & 2) however, on the 14th Music Core did a music festival in Incheon that was later broadcasted on televison as part of their 377th episode, aired 13/9/21. Given Jin's tweet I believe he's referring to this performance.