al-Hasan al-Basri (رحمه الله) said:
"I have found 90 places in the Qur'an where Allah has decreed provisions and guaranteed it for His created beings,
and I have found one place that:
Never make a decision when you're upset. Never send a text message when you're angry. You'll regret it. Don't send that email to your boss or your coworker while you're emotional. Write it. Sleep on it. Wake up the next morning and read it again.
Fear the day you wrong someone so deeply that they no longer argue, defend themselves, or seek revenge. Instead, with tear-filled eyes and a broken heart, they simply say: I place this matter before the Court of Allah.
Ḥasan al-Baṣrī [رحمه الله] used to say:
If you see something undesirable in your child, repent to your Lord and return to Him, because this is something aimed at you.
Meaning the parents' own fault and tendency to sin.
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Abu Malik al-Ash’ari reported: The Messenger of Allah, peace and blessings be upon him, said, “Verily, among the best servants of Allah in this nation are those who, when they are seen, Allah Almighty is remembered. Among the worst servants of Allah in this nation are those
Don’t rush to think bad of people. If you’re not sure, say “I’m not sure.” Unless you saw it with your own eyes, don’t assume. Even if you did see it, remember: everyone makes mistakes. Make dua for them instead.
Ibn al-Qayyim رحمه الله:
“If a rank is decided by Allāh for a servant which he could not attain by his deeds,
Allāh afflicts him with distress in his body or children or wealth, and makes him bear it in patience until he achieves that rank which was written for him.”
Shaykh al-Islam Ibn Taymiyah (رحمة الله) said:
Because of the killing of al-Husayn, [May Allah be pleased with him] shaytaan caused the people to introduce two innovations: the innovation of mourning and wailing on the day of 'Ashura, by slapping the cheeks, weeping,
Ibn Abbas رضي الله عنه said:
"لا تجعل ذرب لسانك على من أنطقك"
"Do not use the sharpness of your tongue on the mother who taught you how to speak."
[أخبار الدولة العباسية ج. ١ ص. ٩١]