Sayyiduna Abdullah bin Abbas (may Allah be pleased with him) said: Sometimes Sayyiduna Umar bin al-Khattab (may Allah be pleased with him) would say to me: Come, let us dive into the water so that we may see which of us can hold his breath longer. And we were in the state of ihram.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 9134