Reference for Sanhedrin 76:9
ואמר רב יהודה אמר רב אדם הראשון בלשון ארמי ספר שנאמר (תהלים קלט, יז) ולי מה יקרו רעיך אל
every generation and its sages. When he came to the generation of Rabbi Akiba, he [Adam] rejoiced at his learning but was grieved at his death,<span class="x" onmousemove="('comment',' R. Akiba was executed by Tineius Rufus after being most cruelly tortured. Cf. Ber. 61b. ');"><sup>22</sup></span> and said: How weighty<span class="x" onmousemove="('comment',' Perhaps to be understood here with a twofold meaning: weighty = honoured; and weighty = a source of heaviness and grief. ');"><sup>23</sup></span> are Thy friends<span class="x" onmousemove="('comment',' [H] is probably here taken in its usual Hebrew meaning, 'Thy friends'. ');"><sup>24</sup></span>