It is narrated from Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "For one who has not (yet) performed Hajj, one Hajj is better than ten military expeditions; and for one who has performed Hajj, one military expedition is better than ten Hajjs; and one expedition at sea is better than ten expeditions on land. Whoever crosses the sea, it is as though he has crossed all the valleys; and the one who becomes dizzy at sea (because of the waves) is like one who is soaked in his own blood in the path of Allah."
No one narrated this hadith from Yahya bin Sa'id (may Allah have mercy on him) except Yahya bin Ayyub (may Allah have mercy on him).
Hadith Referenceالمعجم الأوسط / باب الباء / 3144
Hadith Gradingمحدثین:في إسناده لين
Hadith Takhrij«قال ابن رجب الحنبلي: في أسانيدها لين «فتح الباري شرح صحيح البخاري لابن رجب، ج 6، ص 116»» «أخرجه الحاكم فى «المستدرك» برقم: 2649، وسعيد بن منصور فى «سننه» برقم: 2395، والبيهقي فى «السنن الكبرى» برقم: 8758، وعبد الرزاق فى «مصنفه» برقم: 9630، وابن أبي شيبة فى «مصنفه» برقم: 19752، 19753، والطبراني فى «الكبير» برقم: 14581»