וּבִשְׁלֹ֨חַ יְהוָ֜ה אֶתְכֶ֗ם מִקָּדֵ֤שׁ בַּרְנֵ֙עַ֙ לֵאמֹ֔ר עֲלוּ֙ וּרְשׁ֣וּ אֶת־הָאָ֔רֶץ אֲשֶׁ֥ר נָתַ֖תִּי לָכֶ֑ם וַתַּמְר֗וּ אֶת־פִּ֤י יְהוָה֙ אֱלֹ֣הֵיכֶ֔ם וְלֹ֤א הֶֽאֱמַנְתֶּם֙ ל֔וֹ וְלֹ֥א שְׁמַעְתֶּ֖ם בְּקֹלֽוֹ׃
Dan ketika Yang Mahakekal mengutus kalian dari Kadesh-Barnea dengan berfirman, “Majulah dan dudukilah negeri yang telah Kuberikan kepadamu”, kalian membangkang terhadap perintah Yang Mahakekal, Allahmu, dan kalian tidak percaya kepada-Nya, dan tidak mendengarkan suara-Nya.
Or HaChaim
ובשלוח ה׳ אתכם, "And when the Lord sent you, etc." Moses referred to Joshua and Caleb whom G'd sent to spy out the land telling them: "ascend and take possession of the land אשר אני נתתי לכם, "which I have given to you." A comparison with Numbers 13,2 shows that what G'd had said was אשר אני נתן לבני ישראל, "which I am about to give to the children of Israel." Please look at what I have written on that verse. Moses interrupted recounting what happened during the episode of the golden calf by mentioning the episode with the spies as well as the events at Kivrot Hata-avah, at Massah, and at Taverah, because he wanted to lump together all the occasions when the people had aroused G'd's anger. If he had first completed recounting what happened during the episode of the golden calf he would have created so much of a pause between one act of rebellion and the next that the psychological impact of a series of acts of disobedience which he tried to create would have been diminished.
Rabbeinu Bahya
ולא האמנתם לו, “and you did not believe Him.” This refers to the commandment to trust the Lord in your heart. ולא שמעתם בקולו, “and you did not hearken to His voice.” This refers to the action stemming from belief or non belief, as the case may be.