Set of his own statements on blood-letting: Shabbat 129b
Levi calling Shemuel, "Aryoch": Kiddushin 39a
Levi saying to Shemuel, "Don't sit down until you explain" a specific legal issue: Menachot 38b
Levi asking Shemuel to give him some of an item which Shemuel forbade: Kiddushin 39a
Shemuel using his 'pull' to get Levi admitted to the Yeshiva in Heaven: Berachot 18b
Called Chiyya Bar Rav "Bar Uryan [Decisor of Law]": Berachot 12a
Called "Mar [Master] Shemuel" by Rav Nachman: Kiddushin 21b; Bava Metzia 15a, 16b
Shemuel's father quizzing Shemuel on laws of korbanot, and repeatedly answering "Ishtabashta [You confused it]" when Shemuel answered incorrectly: Zevachim 26a
Shemuel communicating with his father after his father had died: Berachot 18b
Shemuel instructing his scribe, Rav Chinina Bar Shelat, in writing bills for loans: Bava Metzia 15a
Shemuel instructing R' Chananiah bar Sheila in a matter of law: Eruvin 12a
Rav Nachman's father was a scribe for him: Bava Metzia 16b
Rav Anan was a student of Shemuel's: Kiddushin 21b
Rav Anan cited a practice of Shemuel's to prove a legal point: Eruvin 6b
Rav Anan termed Shemuel "Mar Shemuel": Eruvin 6b, 74b
Rav Anan said, "This is the way it was explained to me, by Shemuel": Eruvin 95a; Makkot 3b
Shemuel allowed use of a certain type of entranceway-structure to permit transportation within an alley. Rav Anan destroyed it after Shemuel's death, and Eivot bar Ihi, a resident, said, "I lived here until now under the ruling of Mar Shemuel, but now Rav Anan has knocked it down." [Rashi explains that Rav Anan did this because certain circumstances had changed.]: Eruvin 74a-b
Shemuel ex-communicating his student, Mar Ukva,
for not escorting him once as he usually did: Moed Katan 16b
Mar Ukva saying, "Mar [Master] Shemuel explained it to me this way...": Eruvin 81a
Rav Yechezkel was challenged on a statement by his son, Rav Yehudah; Shemuel chastised Rav Yehudah for it: Kiddushin 32a
R' Chiyya bar Abba and R' Asa and Rava bar Natan learning together, and Rav Nachman listening and approving their words, and saying Shemuel approved their words, too: Eruvin 32b
Rav Nachman was asked a question, and he gave his own answer as well as the different answer of the students of Shemuel: Eruvin 70b
Rav Beruna once cited a lesson taught by Shemuel, and R' Elazar couldn't believe Shemuel had said it. R' Elazar challenged Rav Beruna to show him where Shemuel was staying, which he did. R; Elazar asked Shemuel whether he had said it, and Shemuel confirmed it. R' Elazar challenged the lesson based on another of Shemuel's statements, and Shemuel was silent; it was unclear whether Shemuel had accepted R' Elazar's point: Eruvin 74a-b Rav Papi declined a ground cereal at Mar Shemuel's home on Yom Tov, out of fear that it had been improperly prepared: Beitzah 14b
Shemuel asking Avuha bar Ihi to lend him 100 peppers, saying he would re-pay 120, adding the 20 as a gift rather than prohibited interest: Bava Metzia 75a