Hadith.5637 - Ibn Mahbub narrated from Abdullah ibn Sinan from Abu Abdullah (as) who said
I asked Imam (as) about a paternal brother and a grandfather (in matters of inheritance).
Imam (as) replied: "The inheritance is divided equally between them."
Man Lā Yaḥḍuruh al-Faqīh #657If a man passes away and leaves behind a full brother (from the same father and mother), the entire inheritance goes to that brother....
Man Lā Yaḥḍuruh al-Faqīh #688"Whoever wishes to plunge into the depths of Hell should speak about (the inheritance of) the grandfather."