It is narrated from Sayyiduna al-Fadl bin Abbas (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever among you intends to perform Hajj, let him hasten, for the sick may fall ill, an animal may go astray, and some need may arise."
Hadith Referenceالمعجم الكبير للطبراني / باب الفاء / 15829