Ibrahim advised, discouraged and forbade his father from worshipping idols, just as Allah stated,

﴿وَإِذْ قَالَ إِبْرَهِيمُ لاًّبِيهِ ءَازَرَ أَتَتَّخِذُ أَصْنَاماً ءَالِهَةً﴾

(And (remember) when Ibrahim said to his father Azar: "Do you take idols as gods'') meaning, do you worship an idol instead of Allah

﴿إِنِّى أَرَاكَ وَقَوْمَكَ﴾

(Verily, I see you and your people...) who follow your path,

﴿فِى ضَلَـلٍ مُّبِينٍ﴾

(in manifest error) wandering in confusion unaware of where to go. Therefore, you are in disarray and ignorance, and this fact is clear to all those who have sound reason. Allah also said,

﴿وَاذْكُرْ فِى الْكِتَـبِ إِبْرَهِيمَ إِنَّهُ كَانَ صِدِّيقاً نَّبِيّاً - إِذْ قَالَ لاًّبِيهِ يأَبَتِ لِمَ تَعْبُدُ مَا لاَ يَسْمَعُ وَلاَ يَبْصِرُ وَلاَ يُغْنِى عَنكَ شَيْئاً - يأَبَتِ إِنِّى قَدْ جَآءَنِى مِنَ الْعِلْمِ مَا لَمْ يَأْتِكَ فَاتَّبِعْنِى أَهْدِكَ صِرَاطاً سَوِيّاً - يأَبَتِ لاَ تَعْبُدِ الشَّيْطَـنَ إِنَّ الشَّيْطَـنَ كَانَ لِلرَّحْمَـنِ عَصِيّاً - يأَبَتِ إِنِّى أَخَافُ أَن يَمَسَّكَ عَذَابٌ مِّنَ الرَّحْمَـنِ فَتَكُونَ لِلشَّيْطَـنِ وَلِيّاً - قَالَ أَرَاغِبٌ أَنتَ عَنْ آلِهَتِى يإِبْرَهِيمُ لَئِن لَّمْ تَنتَهِ لأَرْجُمَنَّكَ وَاهْجُرْنِى مَلِيّاً - قَالَ سَلَـمٌ عَلَيْكَ سَأَسْتَغْفِرُ لَكَ رَبِّي إِنَّهُ كَانَ بِى حَفِيّاً - وَأَعْتَزِلُكُمْ وَمَا تَدْعُونَ مِن دُونِ اللَّهِ وَأَدْعُو رَبِّى عَسَى أَلاَّ أَكُونَ بِدُعَآءِ رَبِّى شَقِيًّا ﴾

(And mention in the Book (the Qur'an, the story of) Ibrahim. Verily! He was a man of truth, a Prophet. When he said to his father: "O my father! Why do you worship that which hears not, sees not and cannot avail you in anything O my father! Verily! There has come to me of knowledge that which came not unto you. So follow me. I will guide you to a straight path. O my father! Worship not Shaytan. Verily! Shaytan has been a rebel against the Most Beneficent (Allah). O my father! Verily! I fear lest a torment from the Most Beneficent (Allah) overtakes you, so that you become a companion of Shaytan (in the Hell-fire).'' He (the father) said: "Do you reject my gods, O Ibrahim If you stop not (this), I will indeed stone you. So get away from me safely before I punish you.'' Ibrahim said: "Peace be on you! I will ask forgiveness of my Lord for you. Verily! He is unto me, Ever Most Gracious. And I shall turn away from you and from those whom you invoke besides Allah. And I shall call on my Lord; and I hope that I shall not be unanswered in my invocation to my Lord.'') ﴿19:41-48﴾ Ibrahim continued asking for forgiveness for his father for the rest of his father's life. When his father died an idolator and Ibrahim realized this fact, he stopped asking Allah for forgiveness for him and disassociated himself from him. Allah said,

﴿وَمَا كَانَ اسْتِغْفَارُ إِبْرَهِيمَ لاًّبِيهِ إِلاَّ عَن مَّوْعِدَةٍ وَعَدَهَآ إِيَّاهُ فَلَمَّا تَبَيَّنَ لَهُ أَنَّهُ عَدُوٌّ لِلَّهِ تَبَرَّأَ مِنْهُ إِنَّ إِبْرَهِيمَ لأَوَّاهٌ حَلِيمٌ ﴾

(And invoking for his father's forgiveness was only because of a promise he had made to him. But when it became clear to him that he was an enemy to Allah, he dissociated himself from him. Verily Ibrahim was patient in supplication and forbearing.) ﴿9:114﴾. It was recorded in the Sahih that Ibrahim will meet his father Azar on the Day of Resurrection and Azar will say to him, "My son! This Day, I will not disobey you.'' Ibrahim will say, "O Lord! You promised me not to disgrace me on the Day they are resurrected; and what will be more disgraceful to me than cursing and dishonoring my father'' Then Allah will say, "O Ibrahim! Look behind you!'' He will look and there he will see (that his father was changed into) a male hyena covered in dung, which will be caught by the legs and thrown in the (Hell) Fire.''