Etiquettes of Salat?

[happy spirit]

The saying of the Prophet ﷺ : “When you hear the Iqamah (the call to commence the prayer), then walk (to the mosque) to observe the prayer, but (walk) with tranquility (as-sekeenah)[ As-sakinah: Tranquility while walking.] and calmness (al-waqaar)[ Al-waqar: Calmness, lowering one’s gaze and not looking left and right] and do not be hasty. Any part (of the prayer being observed) you meet (that others are praying in congregation) you should pray (with them), and (afterwards) complete what you missed. [ Agreed upon.]
SOURCE: Some of the Etiquettes of Salah and prayer etiquette - al-fiqh