It was narrated from Ibn 'Abbas that:He came to Ubayy bin Ka'b accompanied by 'Umar. Ubayy came out to them and said: "I noticed some prostatic fluid, so I washed my penis and performed ablution. 'Umar said: "Is that sufficient?" He said: "Yes." He ('Umar) asked: "Did you hear that from the messenger of Allah?" He said: "Yes
Hadith No. 507
Sunan Ibn Majah
Gradings:
Al-Albani:
Daif
Muhammad Fouad Abd al-Baqi:
Daif
Zubair Ali Zai:
Daif