Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) narrates: "The water of the sea is the ablution water of the angels; when they descend, they perform ablution with it, and when they ascend, they perform ablution with it."
Hadith Referenceسنن الدارقطني / كتاب الطهارة / 561
Hadith Takhrij«أخرجه الدارقطني فى ((سننه)) برقم: 561 انفرد به المصنف من هذا الطريق»