Is it beneficial for a deceased father to have Tasbih recited for him, to seek forgiveness for him, to have the Quran read and dedicated to him, and to give charity on his behalf, knowing that he was negligent in prayer during his life? And is the son's seeking forgiveness for his father in this case beneficial, or does it resemble Ibrahim's seeking forgiveness for his father, given that the father pronounces the Shahada and acknowledges the existence of Allah?

Whoever dies upon monotheism will receive and benefit from what is dedicated to them of seeking forgiveness and charity, due to the Prophet’s (peace be upon him) saying: “Indeed, my mother suddenly died, and I think that if she had spoken, she would have given charity. Will she have a reward if I give charity on her behalf?” He said: “Yes.” And due to his (peace be upon him) saying: “When a person dies, all his deeds cease except for three: an ongoing charity, or knowledge from which others benefit, or a righteous child who supplicates for him.”

Likewise, it is permissible to dedicate the reward of financial and physical acts of worship to deceased Muslims, such as supplication, seeking forgiveness, prayer, fasting, Hajj, and reciting the Qur’an. Imam Ahmad said: “Everything good reaches the deceased due to the reported texts.”

As for his negligence in maintaining prayer, it does not amount to major disbelief. Sheikh Al-Uthaymeen inclines to the view that abandoning it sometimes due to laziness does not result in disbelief.