Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) said: No one asked the Prophet (peace and blessings be upon him) about the Dajjal more than I did. He (peace and blessings be upon him) said: "What will you do? He will not harm you." I said: Shall I not kill Ibn Sayyad? He (peace and blessings be upon him) said: "What will you gain by killing him? If he is the Dajjal, you will not be able to kill him; and if he is not the Dajjal, what benefit will you have in killing him?"
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18072
Sayyiduna al-Mughirah bin Shu'bah (may Allah be pleased with him) said: We used to pray the Zuhr prayer with the Prophet of Allah (peace and blessings be upon him) in the intense midday heat, so the Messenger of Allah (peace and blessings be upon him) said to us: "Wait for the prayer until it becomes cooler (delay it), for the intensity of the heat is from the breath of Hell."
Hadith Referenceالمعجم الكبير للطبراني / باب الميم / 18073