Received News from afar of his father's death 3 years after it happened: Moed Katan 20a
How Rabbi Tzaddok talked a matron into ending her sexual harassment of him: Kiddushin 40a
Rabban Gamliel tried to serve Rabbi Eliezer, Rabbi Yehoshua and Rabbi Tzaddok at Rabban Gamliel's son's wedding. Rabbi Eliezer refused to be served, but Rabbi Yehoshua and Rabbi Tzaddok pointed to Avraham's and Gd's service of others, respectively, as models for the greater serving the lesser: Kiddushin 32b
