Do not be with the sinner (fājir), for he will beautify to you the things he does, and he will want you to be like him; and he will beautify to you the worst of his practices; and his entrance upon you and leaving from your company will cause ignominy and discredit [of you]. And do not accompany the fool (aḥmaq), for he will exhaust himself [to help you] but will not benefit you, and he may want to benefit you but end up harming you; his silence is better than his speaking, his distance is better than his closeness, and him dying is better than him living. And do not accompany the liar, for life will not benefit you with him, he will tell others what you say, and tell you what others say; and if you speak the truth, it will not be believed.
Abū Bakr Al-Daynūrī, Al-Mujālasah wa Jawāhir AlʿIlm no. 1379.
Stay away from the sinful amongst the scholars and the ignorant amongst the worshippers, for these two are the calamity of everyone who would fall into fitnah.
Al-Bayhaqī, Shuʿab Al-Īmān ḥadīth 1753.
There is no place for anyone’s opinion [when it comes to] what is in the Book (revelation). The opinion of the imāms (great scholars) is only regarding what the Book did not come down with, and regarding which no Sunnah has passed from the Messenger of Allāh ﷺ. And the opinion of no one is counted in the face of a Sunnah from the Messenger of Allāh ﷺ.
Al-Ājurrī, Al-Sharīʿah #113 et al.
I was young during the time of Allāh’s Messenger ﷺ and I had memorised things he had said; nothing stopped me from speaking except for the fact that there were amongst us men who were older than me.
Ṣaḥīḥ Muslim, Kitāb Al-Janāʾiz #964.
Blessings are with your seniors.
Ibn Ḥibbān et al. Graded ṣaḥīh by Al-Albānī and others. See Al-Ṣaḥīḥah no. 1778.
Whoever takes leadership quickly (too early) will harm a lot of [his] knowledge (will not learn what he needs); and whoever does not take leadership can continue to seek knowledge until he reaches [where he needs to be].
Al-Dārimī, Al-Sunan #554.
“What is the best thing a person is ever given?” He replied, “Innate intelligence.” He then asked, “And if not that?” He replied, “Good conduct.” He then asked, “And if not that?” He replied, “A compassionate brother to consult.” He then asked, “And if not that?” He replied, “Long silence.” He asked, “And if not that?” Ibn Al-Mubārak replied, “Then an early death.”
Al-Dhahabī, Siyar ʾAʿlām Al-Nubalāʾ 8:397.
O Ayyūb, when Allāh brings about knowledge for you, bring about worship of him, and do not let your [sole] concern be to narrate it.
Ibn ʿAbd Al-Barr, Jāmiʿ Bayān Al-ʿIlm, article 1279.
Whoever seeks knowledge sincerely, for the servants of Allāh to benefit by and to benefit himself, then being hidden (from fame) is more beloved to him than seeking loftiness. He is the one who becomes more lowly to himself, strives more in worship, fears Allāh more, yearns for Allāh more, and becomes more humble amongst people. He cares not what he has of this dunyā night or day.
Al-Bayhaqī, Shuʿab Al-Īmān article 1653.
O Yūnus! Do not try to overcome knowledge, for verily knowledge is [like vast] valleys: whichever of them you take will stop you before you traverse it. Instead, take it over the days and nights. And do not take knowledge all at once, for whoever tries to take it all at once will lose it all at once. Rather take it bit by bit over the days and nights.
Ibn ʿAbd Al-Barr, Jāmiʿ Bayān Al-ʿIlm article 652.