Answer: 1. Entering the mosque with the right foot while saying: "Bismillāh, allāhummaftah lī abwāba rahmatik" (In the name of Allah, O Allah, open for me the doors of Your mercy)
2. Not sitting down before offering two Rak‘ahs (unit of prayer)
3. Not passing in front of praying people, not seeking lost objects or selling and buying in mosques
4. Coming out of the mosque with the left foot while saying: "Allāhumma innī as’aluka min fadlik" (O Allah, I ask You for Your favor)