Narrated Aws ibn Thabit al-Ansari: The Messenger of Allah ﷺ said: Act differently from the Jews, for they do not pray in their sandals or their shoes.

Yala bin Shaddad bin Aws said: I came to Muawiyah in Jerusalem. He led us in the Friday prayer. I saw that most of the people in the mosque were the Companions of the Prophet ﷺ. I saw them sitting in ihtiba condition, i. e. sitting on hips erecting the feet and sticking them to the stomach and holding them with hands or tying them with a cloth to the back, while the imam was giving sermon. Abu Dawud said: Ibn Umar used to sit in ihtiba position while the imam gave the Friday sermon. Anas bin Malik, Shuraih, Sa'sa'ah bin Sawhan, Saeed bin al-Musayyib, Ibrahim al-Nakha'i, Makhul, Ismail, Ismail bin Muhammad bin Saad, and Nu'aim bin Sulamah said: There is no harm in sitting in ihtiba position. Abu Dawud said: I do not know whether anyone considered it disapproved except Ubadah bin Nasayy.

Umm Haram reported the Prophet ﷺ as saying “He who becomes sick on a stormy sea and vomits will have the reward of a martyr. And he who is drowned will have a reward of two martyrs.