Rav Anan said, "This is the way it was explained to me, by [Master] Shemuel": Eruvin 95a; Ketuvot 54a; Makkot 3b
Rav Anan cited a practice of Shemuel's to prove a legal point: Eruvin 6b
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
Rav Anan's hunger when a mushroom dish was served at Shemuel's table: Ketuvot 61a
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
Anecdotes involving other Sages
Called Chiyya Bar Rav "Bar Uryan [Decisor of Law]": Berachot 12a
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 Rabbi Chananiah bar Sheila in a matter of law: Eruvin 12a
Rav Yechezkel was challenged on a statement by his son, Rav Yehudah; Shemuel chastised Rav Yehudah for it: Kiddushin 32a
Rabbi Chiyya bar Abba and Rabbi 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 Beruna once cited a lesson taught by Shemuel, and Rabbi Elazar couldn't believe Shemuel had said it. Rabbi 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. Rabbi Elazar challenged the lesson based on another of Shemuel's statements, and Shemuel was silent; it was unclear whether Shemuel had accepted Rabbi Elazar's point: Eruvin 74a-b
Rabbi Elazar quoted a lesson of Rav to Shemuel; Shemuel disapproved forcefully, declaring, "Feed Elazar barley [as in: animal fodder]"! When Rabbi Zeira made aliyah to Israel he heard Rabbi Binyamin bar Yefet quote the lesson in the name of Rabbi Yochanan, and he quoted Shemuel's criticism: Ketuvot 77a
: Ketuvot 77a
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