إذا أمْذَى أحدُكمْ ، ولمْ يَمَسَّها فلْيغسِلْ ذكَرَهُ وأُنْثَيَيْهِ ، ثُمَّ لِيتوضَّأْ ، ولْيُصَلِّ
(صحيح) … [عب طب] عن المقداد بن الأسود. صحيح السنن 201 و 202: حم، د، حب.
It is reported that the Messenger of Allah (peace and blessings of Allaah be upon him) said:
“If one of you releases pre-seminal fluid and he did not touch it  , let him wash his genitals and testicles, after which he can do Wudu’, and then pray.” This hadith was narrated by ‘Abdu-r-Razzak in Musannaf 602 and at-Tabarani in Mu’jam al-Kabir from the words of al-Mikadad ibn al-Aswad.
Sheikh al-Albani called the hadith authentic. See Saheeh al-jami ‘as-saghir 390, Saheeh Abi Dawud 201, 202.
 That is, he did not approach his wife