Reference for Moed Katan 49:14

טפח ליה אבוה בסנדליה א"ל לאו אמינא לך לא תיטרוד עלמא מאי היה שהיה כבר

Said R'Hisda, I have learnt this from himself: 'The honour of a scholar requires that his bier should pass through the door'. They then thought of transferring him from this bed to another, but said R'Hisda to them, l have learnt thus from himself: 'The honour of a scholar requires that he should be taken out on the first bier'. For Rab Judah, as citing Rab, said, Whence is derived the lesson that the honour of a scholar requires that he should be borne on his first bier?

Jastrow