Al-Imām ibn al-Jawzi [may Allāh have mercy on him] said:
“Whomsoever opens the fast of a fasting person, for him will be the reward equivalent to the one who is fasting. Therefore, strive to fast [the blessed month of] Ramadān [a minimum of] sixty days.”
At-Tabsirah, 2/86 | Al-Imām ibn al-Jawzi [may Allāh have mercy on him]