Musannaf Ibn Abi Shaybah 32247 — Marking tenths in the mushaf

Layth said that Mujahid considered it disliked that the marks of tens be placed in the mushaf or that the details of anything be written, and he also considered it disliked to say "Surah al-Baqarah," and he would say: "The surah in which the cow is mentioned."