It is reported about Sayyiduna Ibn Umar (may Allah be pleased with them both) that when he took the ritual bath for janabah (major impurity), he would splash water into his eyes and put his finger into his navel.
This narration is mawquf (stopping at the Companion).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الطهارة / 837
Hadith Gradingمحدثین:صحيح لغيرهٖ
Hadith Takhrij«صحيح لغيرهٖ۔ أخرجه الطبراني في الكبير7/14»