35 Heb “he made darkness around him coverings.” The parallel text in Ps 18:11 reads “he made darkness his hiding place around him, his covering.” 2 Sam 22:12 omits “his hiding place” and pluralizes “covering.” Ps 18:11 may include a conflation of synonyms (“his hiding place” and “his covering”) or 2 Sam 22:12 may be the result of haplography/homoioarcton. Note that three successive words in Ps 18:11 begin with the letter ס (samek): סִתְרוֹ סְבִיבוֹתָיו סֻכָּתוֹ (sitro sévyvotav sukkato).
36 Heb “a sieve of water, clouds of clouds.” The form חַשְׁרַת (khashrat) is a construct of חַשְׁרָה (khashrah, “sieve”), which occurs only here in the OT. A cognate Ugaritic noun means “sieve,” and a related verb חשׁר (“to sift”) is attested in postbiblical Hebrew and Aramaic (see *חשׁר). The phrase חַשְׁרַת־מַיִם (khashrat-mayim) means literally “a sieve of water.” It pictures the rain clouds as a sieve through which the rain falls to the ground. (See F. M. Cross and D. N. Freedman, Studies in Ancient Yahwistic Poetry, 146, note 33.)