Abdullah bin Amr (may Allah be pleased with them both) says: The Messenger of Allah (peace and blessings be upon him) said: "No one should travel by sea except one going on a military expedition, a pilgrim performing Hajj or one performing Umrah. Indeed, beneath the sea is fire, and beneath the fire is sea."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8662
Abdullah bin Amr (may Allah be pleased with them both) said: It is not permissible to perform ablution (wudu) or the ritual bath for major impurity (ghusl) with sea water. Indeed, beneath the sea is fire, then water, then fire, until he counted seven seas and seven fires.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8665
Sayyiduna Ya'la (may Allah be pleased with him) says: The Messenger of Allah (peace and blessings be upon him) said: "The sea is Hell itself." Then he recited this verse: "A Fire whose flames will surround them" [Surah al-Kahf: 29]. Ya'la (may Allah be pleased with him) says: By Allah, I will never enter it, nor will a drop of it ever touch me.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8666
Abdullah bin Amr bin al-As (may Allah be pleased with them both) says: The Messenger of Allah (peace and blessings be upon him) said: "For one who has not performed Hajj, a Hajj is better than ten military expeditions; for one who has performed Hajj, a military expedition is better than ten Hajj pilgrimages; an expedition at sea is ten times better than an expedition on land; whoever crosses the sea, it is as though he has crossed all the valleys; and the one who becomes seasick in it (the sea) is like one weltering in his own blood."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8667
Sayyidah Umm Haram (may Allah be pleased with her) says: The Messenger of Allah (peace and blessings be upon him) said: "If one travelling by sea suffers vomiting (seasickness), he has the reward of one martyr, and the one who drowns has the reward of two martyrs."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8668
Hasan bin Hadiyah says: I met Abdullah bin Umar (may Allah be pleased with them both) and he asked: Where are you from? I said: From the people of Oman. He said: From the people of Oman? I said: Yes! He said: Shall I tell you a hadith I heard from the Messenger of Allah (peace and blessings be upon him)? I said: Certainly! He said: I heard the Messenger of Allah (peace and blessings be upon him) saying: "I know a land called Oman, with the sea on both its sides; coming to Hajj from there is better than two Hajj pilgrimages from other places."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الحج / 8669