They will reap neverending rewards for this act of kindness.
“For we are his workmanship, created in Christ Jesus unto good works, which God hath before ordained that we should walk in them.”
What is very cool about adoption that most people don’t really think about, is that all of us Christians are adopted into God’s family. We’re all adopted by God. Those that adopt kids that aren’t biologically theirs are actually even more ‘closer’ to how God adopts us.