Sayyiduna Shaddad bin Aws (may Allah be pleased with him) narrates from the Prophet (peace and blessings be upon him) that he (peace and blessings be upon him) said: "Soon there will be rulers over you who will delay the prayers beyond their (recommended) times and (as it were) kill them. So pray the prayer at its (proper) time, and make your prayer with them a voluntary prayer." Then, when al-Hajjaj delayed the prayers beyond their times, I (the narrator) used to pray the prayer at its (proper) time and make my prayer with them a voluntary prayer.
Imam al-Tabarani (may Allah have mercy on him) said: "This hadith is not narrated from Sayyiduna Shaddad bin Aws (may Allah be pleased with him) except with this chain, and Isma'il bin Ayyash (may Allah have mercy on him) is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب العين / 4907
Hadith Takhrij«أخرجه أحمد فى «مسنده» برقم: 17397، والبزار فى «مسنده» برقم: 3486، والطبراني فى «الكبير» برقم: 7155»