Allah, exalted be His praise, says: "O you who believe! If a sinful person comes to you with news, verify it carefully, lest you harm a people out of ignorance and then become regretful over what you have done." [Surah al-Hujurat: 6]
And He said: "When you travel in the way of Allah, verify carefully." [Surah al-Nisa: 94]
Anas bin Malik (may Allah be pleased with him) said that the Messenger of Allah (peace and blessings be upon him) said: "Taking one's time is from Allah, the Lord of Might, and haste is from Satan."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب آداب القاضي / 20270