Seed was sown for nothing, seed was shed for nothing
Masturbate. Perform the act of masturbation.
("It is better for a man to go forth and be bold over his children, than for him to do evil for a single hour before the place. And why is all this? Because he goes forth to sow seed in vain... as if he sheds blood, as it is said (Isaiah 57)...under every green tree the slaughterers of the children in the fields...do not call them slaughterers, but rather slaughterers" - Nida 13:1, And so: "Once Jeremiah went to the bathhouse and found there wicked men from the tribe of Ephraim and saw that they were all lying down, lying down for nothing" - Compiler of the Midrash (Eisenstein) Alpha Beta Devan Sira, 43, and so: "It is a great sin to lie down for nothing," Rav rebuked her and said that about these the prophet says "Oh "The slaughterers of children in the wilderness" - Life in the Light/ Feathers, 184)
Translation
Expression (Hebrew)
הוֹצִיא זֶרַע לְבַטָּלָה, שְׁפִיכַת זֶרַע לְבַטָּלָה
Definition (Hebrew)
אוֹנֵן. עֲשֵׂה מַעֲשֵׂה אוֹנָנוּת.
("מוּטָב שֶׁיּוֹצִיא לַעַז עַל בָּנָיו וְאַל יַעֲשֶׂה עַצְמוֹ רָשָׁע שָׁעָה אַחַת לִפְנֵי הַמָּקוֹם. וְכָל כָּךְ לָמָּה? מִפְּנֵי שֶׁמּוֹצִיא שִׁכְבַת זֶרַע לְבַטָּלָה... כְּאִלּוּ שׁוֹפֵךְ דָּמִים שֶׁנֶּאֱמַר(יְשַׁעְיָהוּ נ"ז)...תַּחַת כָּל עֵץ רַעֲנָן שֹׁחֲטֵי הַיְלָדִים בַּנְּחָלִים ...אַל תִּקְרֵי שׁוֹחֲטֵי אֶלָּא סוֹחֲטֵי"-נִדָּה יג ע"א, וְכֵן:"פַּעַם אַחַת הָלַךְ יִרְמְיָה לְבֵית הַמֶּרְחָץ וּמָצָא שָׁם רְשָׁעִים מִשֵּׁבֶט אֶפְרַיִם וְרָאָה כִּי כֻּלָּם מוֹצִיאִין שִׁכְבַת זֶרַע לְבַטָּלָה"- אוֹצַר הַמִּדְרָשִׁים (אַיְזֶנְשְׁטֵיְן) אַלְפָא בֵּיתָא דְּבֶן סִירָא ,43 ,וְכֵן:"חֵטְא גָּדוֹל הוּא לְהוֹצִיא זֶרַע לְבַטָּלָה", צִיֵּץ רַב אֵלֶיהָ וְאָמַר כִּי עַל אֵלֶּה אוֹמֵר הַנָּבִיא "הוֹי שׁוֹחֲטֵי הַיְּלָדִים בִּנְחָלִים"- חַיִּים בְּאֵר/ נוֹצוֹת,184)