Deuteronomy 8:2
JPS-1917וְזָכַרְתָּ֣ אֶת־כׇּל־הַדֶּ֗רֶךְ אֲשֶׁ֨ר הוֹלִֽיכְךָ֜ יְהֹוָ֧ה אֱלֹהֶ֛יךָ זֶ֛ה אַרְבָּעִ֥ים שָׁנָ֖ה בַּמִּדְבָּ֑ר לְמַ֨עַן עַנֹּֽתְךָ֜ לְנַסֹּֽתְךָ֗ לָדַ֜עַת אֶת־אֲשֶׁ֧ר בִּֽלְבָבְךָ֛ הֲתִשְׁמֹ֥ר מִצְוֺתָ֖ו אִם־לֹֽא׃
And thou shalt remember all the way which the LORD thy God hath led thee these forty years in the wilderness, that He might afflict thee, to prove thee, to know what was in thy heart, whether thou wouldest keep His commandments, or no.
Rashi Commentary
התשמר מצותו [THAT HE MIGHT KNOW WHAT WAS IN THY HEART] WHETHER THOU WOULDST KEEP HIS COMMANDMENTS — viz., the commandment that ye should not put Him to the test, and that you should not doubt Him (i.e. His ways).
Other Translations
וְזָכַרְתָּ֣ אֶת־כׇּל־הַדֶּ֗רֶךְ אֲשֶׁ֨ר הוֹלִֽיכְךָ֜ יְהֹוָ֧ה אֱלֹהֶ֛יךָ זֶ֛ה אַרְבָּעִ֥ים שָׁנָ֖ה בַּמִּדְבָּ֑ר לְמַ֨עַן עַנֹּֽתְךָ֜ לְנַסֹּֽתְךָ֗ לָדַ֜עַת אֶת־אֲשֶׁ֧ר בִּֽלְבָבְךָ֛ הֲתִשְׁמֹ֥ר מִצְוֺתָ֖ו אִם־לֹֽא׃
And thou shalt remember all the way which the Lord thy God led thee these forty years in the wilderness, to humble thee, and to prove thee, to know what was in thy heart, whether thou wouldst keep his commandments, or no.