Or have they adopted intercessors besides Allah? Say: “Even though they do not control a thing and have no awareness?” Say: “ Intercession is entirely Allah's affair . The kingdom of the heavens and Earth is His. Then you will be returned to Him.” ( Surat az-Zumar, 39:43-44)
Those who have faith in Allah and yet associate partners with Him assume that these partners will intercede for them on the Day of Judgment. According to their belief, such “guardians” will take responsibility for their followers or purify them. And so they undertake strenuous efforts to earn their approval and constantly think of them. But this is no more than a huge delusion, for Allah states that He will be the only Protector on the Day of Judgment, as follows:
Abandon those who have turned their religion into a game and a diversion, who have been deluded by the life of the world. Remind [them] by it [the Qur'an], lest a person is delivered up to destruction for what he has earned with no protector or intercessor besides Allah. Were he to offer every kind of compensation, it would not be accepted from him... ( Surat al-An‘am, 6:70)
On that Day, no one will befriend another or bear someone's sins. As Allah informs us, only those who please Him will be allowed to intercede, and this person will surely say the truth. Unbelievers will find no guardian or intercessor on that Day, and no support, protection, or intercession, for Allah is the only Guardian and Intercessor:
Allah created the heavens and Earth and everything between them in six days, and then established Himself firmly upon the Throne. You have no protector or intercessor apart from Him. So will you not pay heed? ( Surat as-Sajda, 32:4)