Musannaf Ibn Abi Shaybah 8764 — Marking tenths in the mushaf

Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) disliked ta'shir in the mushaf. (Ta'shir of the Qur'an means placing a mark after every ten verses; dividing it into parts, juz', quarters, halves and thirds is of the same kind. The early generations disliked this because they feared that, through such marginal additions, things that are not in fact part of the Qur'an would become part of it. When this fear ended, the dislike also ended, and for many years now Muslims have practised ta'shir.)