Daughter Needs Encouragement and Protection

We are missionaries in Brazil and have three college agers in the US (one at home). My 19 year old daughter is selling books door-to-door this summer in a strange city by herself (with a reputable company). She knows the Lord but she has not walked closely with him in the past years. I'm asking prayer that she will seek Him in this challenging job with long hours and that He will protect her and bless her so that she knows she can trust and walk with the Lord in a personal way. God is able. Thank you.