“I came to `Abdullah bin `Amr and said to him: ‘Report something to me that you heard from the Messenger of Allah (ﷺ).’ So he set forth before me a scroll and said: ‘This is what the Messenger of Allah (ﷺ) wrote for me.’” He said: “So I looked in it and found in it: ‘Indeed, Abu Bakr As-Siddiq, may Allah be pleased with him, said: “O Messenger of Allah, teach me what to say at morning and afternoon.” He said: “O Abu Bakr, say: ‘O Allah, Creator of the heavens and the earth, Knower of the unseen and the seen, there is none worthy of worship except You, Lord of everything and its Owner, I seek refuge in You from the evil of my soul and from the evil of Shaitan and his Shirk, or that I should do some evil to myself or bring it upon a Muslim (Allāhumma fāṭiras-samāwāti wal-arḍi, `ālimal-ghaibi wash-shahādati, lā ilāha illā anta, rabba kulli shai’in wa malīkahu, a`ūdhu bika min sharri nafsī wa min sharrish-shaiṭāni wa sharakihi, wa an aqtarifa `alā nafsī sū’an, aw ajurrahu ilā muslim).’”
Jami` at-Tirmidhi Book 48, Hadith 160
"Umar bin Al-Khattab said: 'Do not go to extremes with regard to the dowries of women, for if that were a sign of honor and dignity in this world, or a sign of piety before Allah, the Mighty and Sublime, then Muhammad would have done that before you. But he did not give any of his wives, and none of his daughters were given, more than twelve Uqiyyah. A man may increase the dowry until he feels resentment against her and says: You cost me everything I own ('Alaqul-Qirbah)'" "And I was a man born among the 'Arabs, but I did not know the meaning of 'Alaqul-Qirbah' and others of you are saying -about those killed in this or that battle of yours, or who died: 'So-and-so was martyred' or 'so and so died as a martyr.' While perhaps he merely overloaded the backside of his beast, or lined his saddle with gold or silver seeking trade. So do not say that, rather say as the Prophet said: 'Whoever is killed in the cause of Allah, or dies, then he is in Paradise.'"
Sunan an-Nasa'i Book 26, Hadith 154