In the Name of Allaah, the Most Gracious, the Ever-Merciful…
Stated Shaykh Jamaal ad-Deen al-Qaasimee… [*]
Stated Al-Haafith Jalaal ad-Deen as-Suyootee  (may Allaah have Mercy on him):
The blessing of knowledge and gratitude for it is to reference it to its source, as stated by al-Haafith Aboo Taahir as-Silafee , who heard from Abul-[Husayn] as-Sayrafee , who said: I heard Aboo ‘Abdillaah as-Sooree  saying: ‘Abdul-Ghanee ibn Sa’eed  said to me:
When my letter (perhaps a small treatise) reached Aboo ‘Abdillaah al-Haakim , he responded by thanking me for it, and he mentioned that he taught it to the people in dictation form. His written response included acknowledgment of benefitting (from me), and that he does not narrate it except with reference to me.
And [Al-Haakim also said]: Abul-‘Abbaas Muhammad ibn Ya’qoob al-Asamm  narrated to them, that al-‘Abbaas ibn Muhammad ad-Dooree  said: I heard Aboo ‘Ubayd  say:
Being thankful for knowledge means that you take benefit from someone, and then when asked about it, you say: This was hidden from me and I did not have knowledge of it until So-and-So benefitted me with it. This is being thankful for knowledge.
Thus, you do not find me mentioning anything -not one letter- in any of my books except that it is clearly referenced to the one who (originally) said it, clearly identifying his book where he mentioned it.
Source: al-Muzhir fee ‘Uloom al-Lughah (2/273 as found in al-Maktabah ash-Shaamilah) by as-Suyootee.
Translation and footnotes: Moosaa Richardson 
 Jalaal ad-Deen as-Suyootee [d.911]: scholar of Tafseer and Hadeeth, some of his more famous works are the massive ad-Durr al-Manthoor in Tafseer, as well as his part of Tafseer al-Jalaalayn, and Tadreeb ar-Raawee in Hadeeth Sciences.
 Aboo Taahir as-Silafee [d.576]: Muhammad ibn Ahmad al-Asbahaanee, the great scholar of Hadeeth and Fiqh, the authority of the senior scholars of his time. He lived over 100 years. [Siyar A’laam an-Nubalaa’, 21/5-39]
 Abul-Husayn as-Sayrafee [d.500]: ِAl-Mubaarak ibn ‘Abdil-Jabbaar, known as Ibn at-Tuyooree, a great imaam and precise Hadeeth scholar. (His name appears as “Abul-Hasan” in the printed passage, however this was likely misread from the manuscript or mistyped.) [Siyar A’laam an-Nubalaa’, 19/213-216]
 Aboo ‘Abdillaah as-Sooree [d.441]: Muhammad ibn ‘Alee Ash-Shaamee, one of the top, most reliable narrators of his time. [Taareekh Baghdaad, 3/103, Siyar A’laam, 17/627-631]
 ‘Abdul-Ghanee ibn Sa’eed [d.409]: Al-Azdee, the imaam and great scholar of Egypt of his time. [Siyar A’laam an-Nubalaa’, 17/268-273]
 Al-Haakim [d.405]: Aboo ‘Abdillaah Muhammad ibn Ahmad an-Naysaabooree, the great imaam of the hadeeth scholars of his era, the author of Al-Mustadrak, one of the Saheeh hadeeth compilations.
 Abul-‘Abbaas Muhammad ibn Ya’qoob al-Asamm [d.346]: An-Naysaabooree, another highly reliable and respected imaam of hadeeth. [Siyar A’laam an-Nubalaa’ 15/452-460]
 ‘Abbaas ibn Muhammad ad-Dooree [d.271]; Abul-Fadhl al-Baghdaadee, a reliable narrator, a famous student of Yahyaa ibn Ma’een. [Taqreeb at-Tah-theeb, p.488]
 Aboo ‘Ubayd al-Qaasim ibn Sallaam [d.224]: al-Baghdaadee, the famous and highly-reliable scholar and author. [Taqreeb at-Tah-theeb, p.791]
 Moosaa Richardson originally learned this point of benefit from his shaykh, Muhammad ibn ‘Umar Baazmool (may Allaah preserve him), about ten years ago. [as found here]
[*] This article originally included some speech from Jamaal ad-Deen al-Qaasimee in his book, Qawaa’id at-Tahdeeth, as well as some praise for the book attributed to Shaykh Al-Albaanee. After review, al-Qaasimee was found to have honored and promoted people of severe deviation, like Muhyiud-Deen Ibn ‘Arabee, and a number of the Jahmiyyah, after claiming that the heretical sect included a strain of upright adherents! In recent research pinpointing the mistakes of Ibraaheem ar-Ruhaylee, Shaykh ‘Ubayd al-Jaabiree (may Allaah preserve him) stated that al-Qaasimee was “wicked, astray, leading others astray.” [See this (in Arabic).]