Rabbi Eliezer said: what is the meaning of what is written, "And he lay with her that night" (Genesis 30:16)? The word "he" teaches that the Holy One, blessed be He, assisted in that act, as it is said, "Issachar is a strong-boned donkey" (Genesis 49:14) - a donkey caused it for Issachar.
The Donkey That Turned Jacob Toward Issachar's Tent
Yalkut Shimoni on Torah 129:5
אָמַר רַבִּי אֱלִיעֶזֶר, מַאי דִּכְתִיב וַיִּשְׁכַּב עִמָּהּ בַּלַּיְלָה הוּא, מְלַמֵּד שֶׁהַקָּדוֹשׁ בָּרוּךְ הוּא סִיֵּעַ בְּאוֹתוֹ מַעֲשֶׂה שֶׁנֶּאֱמַר (בראשית מט, יד) "יִשָּׂשכָר חֲמֹר גָּרֶם", חֲמוֹר גָּרַם לְיִשָּׂשכָר.