Quran 5:105 — The Feast (Al-Ma'edah)

O you who believe, you should worry only about your own necks. If the others go astray, they cannot hurt you, as long as you are guided. To GOD is your ultimate destiny, all of you, then He will inform you of everything you had done.

[5:104] When they are told, "Come to what GOD has revealed, and to the messenger," they say, "What we found our parents doing is sufficient for us." What if their parents knew nothing, and were not guided?

[5:106] O you who believe, witnessing a will when one of you is dying shall be done by two equitable people among you. If you are traveling, then two others may do the witnessing. After observing the Contact Prayer (Salat), let the witnesses swear by GOD, to alleviate your doubts: "We will not use this to attain personal gains, even if the testator is related to us. Nor will we conceal GOD's testimony. Otherwise, we would be sinners."