Imam Sadiq (a.s) narrated that his noble grandfather (a.s) quoted on the authority of Ameer al-Momineen (a.s)
“Whenever you write a letter for something you need, you must recite Ayat al-Kursi [The Holy Quran: Baqara 2:255], and the end of the chapter Bani Israil so that your need is fulfilled sooner.”