have mercy

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See: relent
References in classic literature ?
Look this day in mercy and blessing on Thy humble people, and graciously hear us, spare us, and have mercy upon us!
And the Hour will be most grievous and most bitter." [At-Tirmithi] Abu Barzah, may Allah be pleased with him, reported that the Messenger of Allah, sallallaahu 'alaihi wa sallam, said: "Man's feet will not move on the Day of Resurrection before he is asked about his life, how he had spent it ..." [At-Tirmithi] 'Umar ibn 'Abdul-'Azeez, may Allah have mercy upon him, was told one day about something he wanted to do: "Delay this until tomorrow" He, replied: "Woe to you!
Hebrew for "have mercy on us," it is taken from a verse in Psalms that reads "Have mercy on us, God, have mercy, for we have had our fill of contempt." According to its website, the organization has so far helped some 18,000 Israelis receive "fair judicial process."
HAVE mercy upon me, O God, according to the multitude of tender mercies blot out my transgressions.
"Have mercy on me, please have mercy; the charges against me are false and no man has ever touched her," she yelled.
For the sake of his sorrowful passion, have mercy on us and on the whole world.
The chaplet has a number of elements, the most significant of which is the repetition of five decades of the phrase: "For the sake of his sorrowful passion, have mercy on us and the whole world."--Mathew Schmalz
In Paul's ardent soul, this hymn echoes the principle he had just stated and which is in a way the central theme of the whole Epistle: "For God has consigned all men to disobedience, that he may have mercy upon all" (Rom 11:32).
Do I not have any rights over you?' He replied: 'Indeed you do, but I was so overwhelmed that I did not realise that the night had finished.' She asked: 'What was it that preoccupied your mind all night long?' He replied: 'I was thinking about the pleasures of Paradise and its description until I heard the call for the Fajr prayer.'" Is'haaq ibn Ibraheem At-Tabari, may Allah have mercy upon him, said: "I never saw anyone fearing for himself the punishment (of the Hereafter) or having the hope of being amongst those who would be rewarded more than al-Fudhayl, may Allah have mercy upon him.
Psalm 51, Miserere mei, Deus (Have mercy on me, God), is a powerful prayer for our modern lives.
Ibn Al-Qayyim, may Allah have mercy upon him, said: "Hoping for the reward of Allah is one of the most supreme and honourable ranks of one who pursues the right path.
Daawood At-Taa'i, may Allah have mercy upon him, said: "The days and the nights are but stages that people go through one at a time, until they eventually come to the end of their journey.