First: Spending on children until they reach puberty
The father is obliged to spend on his children until they reach puberty [324] See Section 2 of Chapter 2 of the Book of Maintenances. .

Second: Spending on sons and daughters after they reach puberty
1- Spending on sons after reaching puberty: The father is obliged to spend on his son after reaching puberty if he is unable to spend on himself or is sick [325] Section 2 of Chapter 2 of the Book of Maintenances. .
2- Spending on daughters after reaching puberty: The father is obliged to spend on his adult daughter if she is not married [326] Section 2 of Chapter 2 of the Book of Maintenances. .

Third: Spending on grandchildren
It is obligatory to spend on grandchildren [327] Section 2 of Chapter 2 of the Book of Maintenances. .