And in the case of the boy, his parents were believers, and We feared that he will become an overburden for them by transgression and disbelief.
The Angels don’t disobey Lord Allah in what He Commands them, but they do what they are commanded with. Angels can’t precede Lord’s Words, and they act with His command as explained in verse 16: 50. Angels will come to earth in a group. That is why Angel Jibreel saying through verse 19: 64: "And We (Angels) don’t descend except with the command of your Lord. To Him belong what is before us, what is behind us and what is in between; and your Lord is not forgetful”. That is why Angel Khidr said “We feared” instead of saying “I feared” in the verse.
If the father and mother are believers who testify Adhikr, they will have only righteous children. And the Impartial Lord will provide to believing parents their children in Paradise even by calling back their children before the age of 15. The woman of Messenger Noah didn’t transform her Jinn soulmate into a believer, so Satan affected their son as explained in verse 17: 64. So the father and mother should be believers for gathering their children in Paradise. The believing parents will teach Adhikr-the Ticket for returning to the Paradise- before the 15th age of children, otherwise, both parents and children will be quarreling with each other in Hell as explained in verses 7: 37-39.
Today, as there is no group of believers anywhere in the world, the believing man and woman should take Asia (the woman of Pharoah) and virgin Maryam (mother of Jesus) as their role models explained in verse 2: 187. See explanation 15: 59-60.