Imam Sadiq (as) explains Allah’s (swt) love and delegations to the Prophet (sawa) and in turn the delegation to Ameer Al-Mu’mineen (as), and how there is no good for those who oppose(d) him.

‘‘I went into the presence of Abū ‘Abdillāh (sawa), and I heard him say: ‘Truly Allāh, to Whom belong Might and Majesty, has educated his Prophet in moral perfections (addaba) because of His love for him, and He has said: “Surely thou, art upon a mighty morality” (al-Qalam, 68:4). Then He delegated (the duty, for example, to educate others) to him, and He to Whom belong Might and Majesty said: “Whatever the Messenger gives you, take; whatever he forbids you, desist from” (al-Hashr, 59:7); and He to Whom belong Might and Majesty said: “Whosoever obeys the Messenger, thereby obeys Allāh” (an-Nisā’, 4:80).’ ’’ He said: ‘‘Then he said: ‘Verily, the Prophet of Allāh delegated (it) to ‘Alī and entrusted (it) to him. Then you accepted this but the (other) people rejected it. By Allāh, we desire that you should speak when we speak, and be silent when we are silent. We are what is between you and Allāh, to Whom belong Might and Majesty. Allāh has not created any good for anyone against our commands.’ ’’

Sanad: There are two chains.

First Chain: Muhammad ibn Yahya has narrated from Ahmad ibn abu Zahir from Ali ibn Isma‘il from Safwan ibn Yahya from ‘Asim ibn Humayd from abu Ishaq al-Nahwi who has said the above hadith

Second Chain: A number of our people have narrated from Ahmad ibn Muhammad from abu Najran from ‘Asim ibn Humayd from abu Ishaq who has said that he heard abu Ja‘far, recipient of divine supreme covenant, say ‘‘I heard Abū ‘Abdillāh (sawa) say: …’’, then he said what is above.

Source: Usool Al-Kafi, Volume 1, Hadith #686

Grading: Allaamah Majlisi said the first chain is unknown, and the second chain is Sahih/Authentic (مجهول بالسند الول صحيح بالسند الثاني), Mira’at Al-Uqool, Volume 3, Page 141 – (See Image)

محمد بن يحيى، عن أحمد بن أبي زاهر، عن علي بن إسماعيل، عن صفوان ابن يحيى، عن عصام بن حميد، عن أبي إسحاق النحوي قال: دخلت على أبي عبد الله عليه السلام فسمعته يقول: إن الله عز وجل أدب نبيه على محبته فقال: ” وإنك لعلى خلق عظيم ” ثم فوض إليه فقال عز وجل: ” وما آتاكم الرسول فخذوه وما نهاكم عنه فانتهوا ” وقال عز وجل: ” من يطع الرسول فقد أطاع الله ” قال: ثم قال وإن نبي الله فوض إلى علي وائتمنه فسلمتم وجحد الناس فوالله لنحبكم أن تقولوا إذا قلنا وأن تصمتوا إذا صمتنا ونحن فيما بينكم وبين الله عز وجل، ما جعل الله لاحد خيرا في خلاف أمرنا.
عدة من أصحابنا، عن أحمد بن محمد، عن ابن أبي نجران، عن عاصم بن حميد، عن أبي إسحاق قال: سمعت أبا جعفر عليه السلام يقول ثم ذكر نحوه