Shyness

وعن ابن عمر رضي الله عنهما أن رسول الله صلى الله عليه وسلم مر على رجل من الأنصار وهو يعظ أخاه في الحياء، فقال رسول الله صلى الله عليه وسلم‏: ‏ "دعه فإن الحياء من الإيمان" ‏(‏‏(‏متفق عليه‏)‏‏)‏ ‏.‏

Ibn 'Umar (May Allah be pleased with them) reported: Messenger of Allah (ﷺ) passed by a man of the Ansar who was admonishing his brother regarding shyness. Messenger of Allah (ﷺ) said, "Leave him alone, for modesty is a part of Iman."
[Al-Bukhari and Muslim].

Riyad as-Salihin 680
https://sunnah.com/riyadussalihin:680

Salah in Congregation

The Messenger of God (PBUH), said: Whoever prays the Isha prayer in congregation, it is as if he prayed half a night, and whoever prays the Isha and Fajr prayers in congregation, it is as if he prayed all night.

Narrated by Al-Tirmidhi