Reference for Arakhin 5:2
דְּמֵי יָדִי עָלָי, שָׁמִין אוֹתוֹ, כַּמָּה הוּא שָׁוֶה בְּיָד, וְכַמָּה הוּא שָׁוֶה בְּלֹא יָד. זֶה חֹמֶר בַּנְּדָרִים מִבָּעֲרָכִין. וְחֹמֶר בָּעֲרָכִין מִבַּנְּדָרִים, כֵּיצַד. הָאוֹמֵר, עֶרְכִּי עָלָי, וָמֵת, יִתְּנוּ הַיּוֹרְשִׁין. דָּמַי עָלָי, וָמֵת, לֹא יִתְּנוּ הַיּוֹרְשִׁים, שֶׁאֵין דָּמִים לַמֵּתִים. עֵרֶךְ יָדִי וְעֵרֶךְ רַגְלִי עָלָי, לֹא אָמַר כְּלוּם. עֵרֶךְ רֹאשִׁי וְעֵרֶךְ כְּבֵדִי עָלָי, נוֹתֵן עֵרֶךְ כֻּלּוֹ. זֶה הַכְּלָל, דָּבָר שֶׁהַנְּשָׁמָה תְלוּיָה בוֹ, נוֹתֵן עֵרֶךְ כֻּלּוֹ:
[If one said,] “the worth of my hand is upon me,” they estimate his worth with his hand and [what it would be] without his hand. In this respect vows of worth are more stringent than vows of value, [while] there is an aspect of vows of value that is more stringent than vows of worth How so? If one said, “my value is upon me” and then he dies, his heirs must give it. [But if he said,] “my worth is upon me,” and then he dies, his heirs need not give anything because dead persons have no worth. [If he said,] “the value of my hand or foot is upon me,” he has said nothing; [but if he said,] “the value of my head is upon me,” he must give his whole value. This is the general rule: Anything upon which his life depends, he must give his whole value.