إِنَّا لِلّهِ وَإِنَّـا إِلَيْهِ رَاجِعونَ
May Allah bless him with heaven and you, with patience. The best we can do now is pray for him for that's all he needs. And, try to pray for both together. I started when my mother was still alive but father had passed away; mum's counter began in her lifetime.
May Allah forgive your parents, my parents, and everyone's parents, for the sins they committed knowingly, unknowingly, publicly, privately, individually, collectively, make their 'hisaab' quick and easy, and grant them the highest place in Heaven.
Sent from my Sony Xperia U