ב הָיָה עוֹמֵד וְנִזְכַּר שֶׁהִתְפַּלֵּל רַב אָמַר חוֹתֵךְ. וּשְׁמוּאֵל אָמַר אֵינוֹ חוֹתֵךְ. שִׁמְעוֹן בַּר וָוא בְּשֵׁם רִבִּי יוֹחָנָן וּולְוַאי שֶׁיִּתְפַּלֵּל אָדָם כָּל הַיּוֹם. לָמָּה שֶׁאֵין תְּפִילָּה מַפְסֶדֶת. רִבִּי זְעִירָא בְּעָא קוֹמֵי רִבִּי יוֹסֵי לֵית מִילְתֵיהּ דְּרִבִּי יוֹחָנָן אָמְרָה סָפֵק נִתְפַּלֵּל סָפֵק לֹא נִתְפַּלֵּל אַל יִתְפַּלֵּל. וְלֹא אֲגִיבֵהּ. אָתָא רִבִּי אַבָּהוּ בְּשֵׁם רִבִּי יוֹחָנָן סָפֵק נִתְפַּלֵּל סָפֵק לֹא נִתְפַּלֵּל אַל יִתְפַּלֵּל. רִבִּי חֲנִינָא לֹא אָמַר כֵּן אֵלָּא בְּעַיָין קוֹמֵי רִבִּי יוֹחָנָן סָפֵק נִתְפַּלֵּל סָפֵק לֹא נִתְפַּלֵּל אֲמַר לוֹן וּולְוַאי שֶׁמִּתְפַּלְּלִין כָּל הַיּוֹם. לָמָּה שֶׁאֵין תְּפִילָּה מַפְסֶדֶת.
2 If one was praying and remembered that he already had prayed, Rav says, he cuts short, and Samuel says, he does not cut short. Simeon bar Abba in the name of Rebbi Yoḥanan: If only one would pray the whole day long, why, because prayer is never in vain. Rebbi Zeïra asked before Rebbi Yose: Did not Rebbi Yoḥanan say that if one is in doubt whether he did pray or not, that he should not pray? He did not give him an answer. Rebbi Abbahu came in the name of Rebbi Yoḥanan: If one is in doubt whether he did pray or not, he should not pray. Rebbi Ḥanina did not say so but: They asked before Rebbi Yoḥanan, if one is in doubt whether he did pray or not? He told them, if only one would pray the whole day long, why, because prayer is never in vain.