Sunan Ibn Majah 606

It was narrated from Abu Sa'eed Al-Khudri that:The Messenger of Allah passed by (the house of) one of the Ansar and sent word for him to come out. He came out with his head dripping and (the Prophet) said: "Perhaps we made you hurry?"He said: "O Messenger of Allah." He said, "If you are hurried (by someone) or obstructed (from orgasm) and do not ejaculate, then you do not have to take a bath, but you should perform ablution