Is taking the children to Saudi Arabia considered disobedience to parents, knowing the grandparents' strong attachment to their grandchildren and the possibility of the mother suffering psychologically, along with the children's need for their father and his inability to leave his job in Saudi Arabia?

Filial piety and obedience to parents are obligatory, unless the parents request something that is not their right. The custody of children is a right of both parents, and one should not relinquish the children's right to be close to their parents and to be raised in their care. However, one should deal with the mother with gentleness and wisdom when taking the children from her.