Uqbah bin Abi A'ishah narrates: I saw Sayyiduna Abdullah bin Jabir al-Bayadi (may Allah be pleased with him), a Companion of the Prophet (peace and blessings be upon him), placing one hand over the other forearm during prayer.
Al-Tabarani recorded it in al-Mu'jam al-Kabir, and its chain is hasan (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الصلاة / 2612