Maybe the following scriptures might be of comfort to your mother.

Psalms 37: 4 Take delight in the Lord, and He will give you your heart's desires.

Jer 29:11 For I know the plans I have for you," declares the Lord, "plans to prosper you and not to harm you, plans to give you hope and a future.

Ro 8:28 And we know that in all things God works for the good of those who love him, who have been called according to his purpose

Isa 46:10 From the beginning I predicted the outcome; long ago I foretold what would happen. I said that my plans would never fail, that I would do everything I intended to do.

http://crosswalk.com/ is is a great resource for finding Scriptures. You just enter a word and it will find every Scripture with that word in it in whatever version of the Bible you specify.