Muslims rely on Him (swt) in all circumstances and conditions by saying, الْوَكِيلُ حَسْبُنَا اللّٰهُ وَنِعْمَ (Hasbunallahu wa ni'mal wakil), meaning "Allah alone is sufficient as an aid for us. He is the best Protector."[i]
[i] Al-i 'Imran, 3/173.
In accordance with our Lord Almighty's (swt) verse, فَاذْكُرُون۪ٓي اَذْكُرْكُمْ "Remember Me; I will remember you." [i], Muslims start everything they do in the name of Allah (swt).
[i] Baqarah, 2/152.
When Muslims have a wish in their hearts, they say "Insha Allah!" and declare that nothing will happen without Allah's (swt) will. They express their congratulations and appreciation with "Masha Allah!" and "Barak Allah!"
When Muslims set out on a journey or say goodbye to their loved ones, they say "Fi Amanillah."