Verily, the creation of each one of you is brought together in his mother’s womb for forty days as a drop, then he is a clot for a similar period, then a morsel for a similar period, then there is sent to him the angel who blows the spirit into him and he is commanded regarding four matters: to write down his provision, his life span, his deeds, and whether he is blessed or damned. By Allah, other than whom there is no God, one of you acts like the people of Paradise until he is but an arm’s length from it, and what is written overtakes him so he acts like the people of Hellfire and he enters it. Verily, one of you acts like the people of Hellfire until he is but an arm’s length from it, and what is written overtakes him so he acts like the people of Paradise and he enters it. Source: Ṣaḥīḥ al-Bukhārī 7454, Grade: Muttafaqun Alayhi
Hadith 5: Religious innovation البدعة
Aisha reported: The Messenger of Allah, peace be upon him, said:
Whoever innovates into this matter of ours that which does not belong to it, it will be rejected. Source: Ṣaḥīḥ al-Bukhārī 2697, Grade: Muttafaqun Alayhi