Imam Sadiq (a.s) said: “Do not start doing something which you might stop doing before twelve month passes.”
عنه (عليه السلام) قال
إياك أن تفرض على نفسك فريضة فتفارقها اثنى عشر هلالا.
Similar narrations
Al-Kāfi #218“Abu ‘Abd Allah (a.s.) has said, ‘Be careful and do not give up on a good deed that you may have decided to do, before twelve lunar months...