[If] someone immersed in a river, and there was another river in front of him, and he crossed it, [the water of] the second [river] cleanses [the water of] the first [river].  [If] his friend pushed him due to his drunkenness, and likewise to his ani-mal, [the water of] the second [river] cleanses [the water of] the first [river]. But if he was sporting with him, it is included in [the law of] “if [water] is placed.”

[If] someone swims on the water, the [water that] splashes is not included in [the law of] ”if [water] is placed.” But if he in-tended to splash [water] on his friend, this is included in [the law of] ”if [water] is placed.”  [If] someone makes bubbles in the water, the [water that] splashes and that which is in it are not included in [the law of] ”if [water] is placed.”

[Concerning] produce into which a leak drips, and he mixed them so that they may dry, R’ Shimon says: [They are] included in [the law of] ”if [water] is placed.” But the Sages say: They are not included in [the law of] ”if [water] is placed.”

[If] someone measured a cistern, whether along its depth or along its width, it is included in [the law of] ”if [water] is placed.” [These are] the words of R’ Tarfon. R’ Akiva says: Along its depth, it is included in [the law of] ”if [water] is placed”; but along its width, it is not included in [the law of] ”if [water] is placed.”