Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates that the Prophet (peace and blessings be upon him) said: "There are three things: whoever comes with them along with faith will enter Paradise through whichever of its gates he wishes, and will be married to whichever of the wide-eyed houris he wishes. (These three matters are:) that the person forgives his killer, pays off a hidden debt, and recites Surah al-Ikhlas ten times after every obligatory prayer." The narrator says: Sayyiduna Abu Bakr (may Allah be pleased with him) said: "O Messenger of Allah, and if he does just one of these things?" The Prophet (peace and blessings be upon him) said: "Even if he does just one of them (that is, he will still attain the same reward)."
Abu Ya'la recorded it; its chain contains Umar bin Nabhan, and he is matruk (abandoned).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب الأذكار / 16925