His mother asked him to stop smoking before her death, but he could not
22-11-2009 | IslamWeb
Question:
ASSALAM U ALIAKUM..WHEN MY MOTHER WAS ALIVE. SHE ANGERY ME AND TOLD TO STOP SMOKING.ATHERWISE I AM NOT ALLOWED U (HALAL) MY BREAST FEEDING MILK. BUT I CAN,T STOP SMOKING. I THENK I WILL SAY HER LEATER FORGIVE ME I SMOKED.BUT SHE DIED AND DIN,T ASK HER. NOW WHAT THE MILK WICH SHE FEED ME ITS REALY (HARAM)FOR ME OR ITS WAS JUST A REACTION OF ANGERNES.BUT AFTER HER DITH ALSO I SMOKE BQAZ ITS WAS VERY HARD FOR ME TO STOP IT. BUT NOW I STOPD IT TOTLY.SO PLZ HEALP ME ... THANK YOU.
Answer:
All perfect praise be to Allaah, The Lord of the Worlds. I testify that there is none worthy of worship except Allaah, and that Muhammad, sallallaahu ‘alayhi wa sallam, is His Slave and Messenger.
You have done well when you stopped smoking, and we ask Allaah The Almighty to protect you from every evil and harm; and we advise you to accompany righteous people.
We previously clarified the prohibition of smoking in Fatwa 81589, so a Muslim must stop smoking since its prohibition is established in Sharee’ah. The obligation to quit smoking becomes more confirmed in your regard by your mother's order to stop it. That is because obedience to parents is obligatory in righteousness. Your mother 
ordered you to do a good deed and wished you all goodness. Thus, we urge you to be dutiful to her after her death by supplicating Allaah for her, giving charity and other good acts on her behalf. For further information see Fatwa 83233about dutifulness to one's parents after their death.
However, there are no consequences for your mother's saying that the milk she breastfed you is not lawful to you if you did not stop smoking. So, do not care about that and rather focus on doing the deeds which benefit you in this life and in the Hereafter.
Allaah Knows best.