Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) narrates: I have performed prayers behind the Prophet Muhammad (peace and blessings be upon him), behind Sayyiduna Abu Bakr (may Allah be pleased with him), and behind Sayyiduna Umar (may Allah be pleased with him); these personalities used to raise their hands only at the beginning of the prayer with the first takbeer. The narrator named Ishaq has stated: We will adopt this narration regarding the method of performing prayer. The narration of this hadith is unique to the narrator Muhammad bin Jabir, and he is weak. Muhammad bin Jabir has narrated it from the narrator Hammad, from Ibrahim Nakha'i, whereas narrators other than Hammad have narrated it from Ibrahim Nakha'i as a mursal narration, as the action of Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) himself. They have not narrated it as a marfu' hadith, which would be attributed to the Prophet Muhammad (peace and blessings be upon him), and this is the correct narration.