Majma al-Zawaid 2626 — Bismillah al-Rahman al-Rahim

It is reported about Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) that he was asked about reciting "Bismillahir-Rahmanir-Rahim" aloud (when reciting during prayer), and he said: "We used to consider it the way the Bedouins recite."
Al-Bazzar recorded it. Its chain contains a narrator Abu Sa'd al-Baqqal; he is "thiqah" (trustworthy) but a mudallis (one who conceals defects in the chain), and he narrated this with 'an'anah (using "from"). The remaining narrators of this report are the narrators of the "Sahih".