Have you ever loved someone so deeply? Be it spouse, parents, siblings or even friends? When you love someone that deep, you would move the world for them if you have to, just to make them feel okay and happy. You know what else you would do for someone who you love that much? You pray for him/her. It doesn't matter what religion you follow, even if you are an atheist, you would at least wish the person well.
You would pray for that person because you always want that person to succeed and go higher in life and that will make you both happy.
Love is a really beautiful thing.