How was it permissible for the Companions to restrict the Qur'an to a single script and abolish the six remaining scripts?

Question : What do you say? Have you heard him say: How was it permissible for the Companions to abolish the six remaining scripts and restrict it to a single script?

Answer : The answer is that reciting the Qur'an in six scripts is not a matter of obligation, but rather a matter of permissibility. If a permissible matter is feared to lead to fitnah (trial, discord or temptation), it is left. If the Messenger (peace and blessings be upon him) left what was recommended regarding the construction of the Ka'bah according to the foundations of Ibrahim, out of fear of fitnah, then this is even more so. And if 'Umar (may Allah be pleased with him) prevented a woman from returning to her husband if he divorced her three times, out of fear of people becoming engrossed in this forbidden divorce, then this is likewise. This is part of shari'ah policy: if a thing is a means to what is prohibited, it is prohibited.