(5) CHAPTER. What is disliked of going deeply into and arguing about (religious) knowledge, and exaggerating in matter of religion, and of inventing heresies.
Narrated Abu Huraira: The Prophet said (to his companions), Do not fast Al-Wisal. They said, But you fast Al-Wisail. He said, I am not like you, for at night my Lord feeds me and makes me drink. But the people did not give up Al-Wisal, so the Prophet fasted Al-Wisal with them for two days or two nights, and then they saw the crescent whereupon the Prophet said, If the crescent had delayed, I would have continued fasting (because of you), as if he wanted to vanquish them completely (because they had refused to give up Al Wisal).
Narrated Ibrahim At Taimi's father: `Ali addressed us while he was standing on a brick pulpit and carrying a sword from which was hanging a scroll He said By Allah, we have no book to read except Allah's Book and whatever is on this scroll, And then he unrolled it, and behold, in it was written what sort of camels were to be given as blood money, and there was also written in it: 'Medina is a sanctuary form 'Air (mountain) to such and such place so whoever innovates in it an heresy or commits a sin therein, he will incur the curse of Allah, the angels, and all the people and Allah will not accept his compulsory or optional good deeds.' There was also written in it: 'The asylum (pledge of protection) granted by any Muslims is one and the same, (even a Muslim of the lowest status is to be secured and respected by all the other Muslims, and whoever betrays a Muslim in this respect (by violating the pledge) will incur the curse of Allah, the angels, and all the people, and Allah will not accept his compulsory or optional good deeds.' There was also written in it: 'Whoever (freed slave) befriends (takes as masters) other than his real masters (manumitters) without their permission will incur the curse of Allah, the angels, and all the people, and Allah will not accept his compulsory or optional good deeds. ' (See Hadith No. 94, Vol. 3)
Narrated `Aisha: The Prophet did something as it was allowed from the religious point of view but some people refrained from it. When the Prophet heard of that, he, after glorifying and praising Allah, said, Why do some people refrain from doing something which I do? By Allah, I know Allah more than they.