וְעַתָּ֖ה אֱלֹהֵ֣י יִשְׂרָאֵ֑ל יֵאָ֤מֶן נָא֙ דבריך [דְּבָ֣רְךָ֔] אֲשֶׁ֣ר דִּבַּ֔רְתָּ לְעַבְדְּךָ֖ דָּוִ֥ד אָבִֽי׃
Agora também, ó Deus de Israel, cumpra-se a tua palavra, que disseste a teu servo Davi, meu pai.
Rabbeinu Bahya
We have numerous instances when the petitioner describes himself as addressing a particular attribute and at the same time expects to receive his response from a different attribute. Example: Psalms 55,17 אני אל אלו-הים אקרא וי-ה-ו-ה יושיעני, “I will call out to Elohim, and Hashem will deliver me.”—An example of a different nature which comes to mind is Psalms 6,10 where David had addressed the attribute Hashem asking not to be judged by an attribute G’d employs when He is angry. David acknowledges that Hashem answered him. There are too many examples of man addressing the attribute Hashem directly for us to have to enumerate them.
If you will examine Solomon’s prayer more closely you will observe that he too did not address himself simply to the subordinate attribute Elohim, but that he combined both attributes in his petition addressing himself to י-ה-ו-ה- אלו-הי ישראל, “the Lord G’d of Israel.” He stressed merely that there is none like Him either on earth or in the heavens. Solomon avoided using the attribute אלו-הי ישראל exclusively when appealing to G’d. [The specific verse quoted by the author from Kings I 8,26 has Solomon saying: ועתה אלו-הי ישראל, without referring to the attribute Hashem. The verse prior does indeed begin ועתה ה' אלו-הי ישראל. Ed.] At any rate, we find that sometimes a combination of G’d’s attributes is being addressed, whereas at other times only a single attribute, be it Hashem or Elohim is being addressed
If you will examine Solomon’s prayer more closely you will observe that he too did not address himself simply to the subordinate attribute Elohim, but that he combined both attributes in his petition addressing himself to י-ה-ו-ה- אלו-הי ישראל, “the Lord G’d of Israel.” He stressed merely that there is none like Him either on earth or in the heavens. Solomon avoided using the attribute אלו-הי ישראל exclusively when appealing to G’d. [The specific verse quoted by the author from Kings I 8,26 has Solomon saying: ועתה אלו-הי ישראל, without referring to the attribute Hashem. The verse prior does indeed begin ועתה ה' אלו-הי ישראל. Ed.] At any rate, we find that sometimes a combination of G’d’s attributes is being addressed, whereas at other times only a single attribute, be it Hashem or Elohim is being addressed
Rashi
ויאמנו דבריכם— means so shall your words be verified and confirmed. Other examples are, (Numbers 5:22) “It is true, it is true (אמן אמן)”, and (1 Kings 8:26) “Let thy word, I pray thee, be verified (יאמן).”